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Comparing Coro/Coro/State.xs (file contents):
Revision 1.79 by root, Thu Nov 2 12:29:08 2006 UTC vs.
Revision 1.316 by root, Thu Nov 20 06:01:40 2008 UTC

1#include "libcoro/coro.c"
2
1#define PERL_NO_GET_CONTEXT 3#define PERL_NO_GET_CONTEXT
2 4#define PERL_EXT
3#include "libcoro/coro.c"
4 5
5#include "EXTERN.h" 6#include "EXTERN.h"
6#include "perl.h" 7#include "perl.h"
7#include "XSUB.h" 8#include "XSUB.h"
9#include "perliol.h"
8 10
9#include "patchlevel.h" 11#include "patchlevel.h"
10 12
11#if PERL_VERSION < 6 13#include <stdio.h>
14#include <errno.h>
15#include <assert.h>
16
17#ifdef WIN32
18# undef setjmp
19# undef longjmp
20# undef _exit
21# define setjmp _setjmp /* deep magic */
22#else
23# include <inttypes.h> /* most portable stdint.h */
24#endif
25
26#ifdef HAVE_MMAP
27# include <unistd.h>
28# include <sys/mman.h>
29# ifndef MAP_ANONYMOUS
30# ifdef MAP_ANON
31# define MAP_ANONYMOUS MAP_ANON
32# else
33# undef HAVE_MMAP
34# endif
35# endif
36# include <limits.h>
37# ifndef PAGESIZE
38# define PAGESIZE pagesize
39# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
40static long pagesize;
41# else
42# define BOOT_PAGESIZE (void)0
43# endif
44#else
45# define PAGESIZE 0
46# define BOOT_PAGESIZE (void)0
47#endif
48
49#if CORO_USE_VALGRIND
50# include <valgrind/valgrind.h>
51#endif
52
53/* the maximum number of idle cctx that will be pooled */
54static int cctx_max_idle = 4;
55
56#define PERL_VERSION_ATLEAST(a,b,c) \
57 (PERL_REVISION > (a) \
58 || (PERL_REVISION == (a) \
59 && (PERL_VERSION > (b) \
60 || (PERL_VERSION == (b) && PERL_SUBVERSION >= (c)))))
61
62#if !PERL_VERSION_ATLEAST (5,6,0)
12# ifndef PL_ppaddr 63# ifndef PL_ppaddr
13# define PL_ppaddr ppaddr 64# define PL_ppaddr ppaddr
14# endif 65# endif
15# ifndef call_sv 66# ifndef call_sv
16# define call_sv perl_call_sv 67# define call_sv perl_call_sv
… …
27# ifndef IS_PADCONST 78# ifndef IS_PADCONST
28# define IS_PADCONST(v) 0 79# define IS_PADCONST(v) 0
29# endif 80# endif
30#endif 81#endif
31 82
32#include <errno.h> 83/* 5.11 */
84#ifndef CxHASARGS
85# define CxHASARGS(cx) (cx)->blk_sub.hasargs
86#endif
87
88/* 5.10.0 */
89#ifndef SvREFCNT_inc_NN
90# define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv)
91#endif
92
93/* 5.8.8 */
94#ifndef GV_NOTQUAL
95# define GV_NOTQUAL 0
96#endif
97#ifndef newSV
98# define newSV(l) NEWSV(0,l)
99#endif
100#ifndef CvISXSUB_on
101# define CvISXSUB_on(cv) (void)cv
102#endif
103#ifndef CvISXSUB
104# define CvISXSUB(cv) (CvXSUB (cv) ? TRUE : FALSE)
105#endif
106
107/* 5.8.7 */
108#ifndef SvRV_set
109# define SvRV_set(s,v) SvRV(s) = (v)
110#endif
33 111
34#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 112#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
35# undef STACKGUARD 113# undef CORO_STACKGUARD
36#endif 114#endif
37 115
38#ifndef STACKGUARD 116#ifndef CORO_STACKGUARD
39# define STACKGUARD 0 117# define CORO_STACKGUARD 0
40#endif
41
42#ifdef HAVE_MMAP
43# include <unistd.h>
44# include <sys/mman.h>
45# ifndef MAP_ANONYMOUS
46# ifdef MAP_ANON
47# define MAP_ANONYMOUS MAP_ANON
48# else
49# undef HAVE_MMAP
50# endif 118#endif
119
120/* prefer perl internal functions over our own? */
121#ifndef CORO_PREFER_PERL_FUNCTIONS
122# define CORO_PREFER_PERL_FUNCTIONS 0
123#endif
124
125/* The next macros try to return the current stack pointer, in an as
126 * portable way as possible. */
127#if __GNUC__ >= 4
128# define dSTACKLEVEL int stacklevel_dummy
129# define STACKLEVEL __builtin_frame_address (0)
130#else
131# define dSTACKLEVEL volatile void *stacklevel
132# define STACKLEVEL ((void *)&stacklevel)
133#endif
134
135#define IN_DESTRUCT (PL_main_cv == Nullcv)
136
137#if __GNUC__ >= 3
138# define attribute(x) __attribute__(x)
139# define expect(expr,value) __builtin_expect ((expr),(value))
140# define INLINE static inline
141#else
142# define attribute(x)
143# define expect(expr,value) (expr)
144# define INLINE static
145#endif
146
147#define expect_false(expr) expect ((expr) != 0, 0)
148#define expect_true(expr) expect ((expr) != 0, 1)
149
150#define NOINLINE attribute ((noinline))
151
152#include "CoroAPI.h"
153#define GCoroAPI (&coroapi) /* very sneaky */
154
155#ifdef USE_ITHREADS
156# if CORO_PTHREAD
157static void *coro_thx;
51# endif 158# endif
52# include <limits.h>
53# ifndef PAGESIZE
54# define PAGESIZE pagesize
55# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
56static long pagesize;
57# else
58# define BOOT_PAGESIZE
59# endif 159#endif
60#endif
61 160
62#define SUB_INIT "Coro::State::initialize" 161static double (*nvtime)(); /* so why doesn't it take void? */
63#define UCORO_STATE "_coro_state"
64 162
65/* The next macro should declare a variable stacklevel that contains and approximation 163/* we hijack an hopefully unused CV flag for our purposes */
66 * to the current C stack pointer. Its property is that it changes with each call 164#define CVf_SLF 0x4000
67 * and should be unique. */ 165static OP *pp_slf (pTHX);
68#define dSTACKLEVEL void *stacklevel = &stacklevel
69 166
70#define IN_DESTRUCT (PL_main_cv == Nullcv) 167static U32 cctx_gen;
71 168static size_t cctx_stacksize = CORO_STACKSIZE;
72#define labs(l) ((l) >= 0 ? (l) : -(l))
73
74#include "CoroAPI.h"
75
76#ifdef USE_ITHREADS
77static perl_mutex coro_mutex;
78# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
79# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
80#else
81# define LOCK (void)0
82# define UNLOCK (void)0
83#endif
84
85static struct CoroAPI coroapi; 169static struct CoroAPI coroapi;
86static AV *main_mainstack; /* used to differentiate between $main and others */ 170static AV *main_mainstack; /* used to differentiate between $main and others */
171static JMPENV *main_top_env;
87static HV *coro_state_stash; 172static HV *coro_state_stash, *coro_stash;
88static SV *ucoro_state_sv;
89static U32 ucoro_state_hash;
90static SV *coro_mortal; /* will be freed after next transfer */ 173static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
91 174
92/* this is actually not only the c stack but also c registers etc... */ 175static GV *irsgv; /* $/ */
176static GV *stdoutgv; /* *STDOUT */
177static SV *rv_diehook;
178static SV *rv_warnhook;
179static HV *hv_sig; /* %SIG */
180
181/* async_pool helper stuff */
182static SV *sv_pool_rss;
183static SV *sv_pool_size;
184static SV *sv_async_pool_idle;
185static AV *av_async_pool;
186static SV *sv_Coro;
187static CV *cv_pool_handler;
188static CV *cv_coro_state_new;
189
190/* Coro::AnyEvent */
191static SV *sv_activity;
192
193static struct coro_cctx *cctx_first;
194static int cctx_count, cctx_idle;
195
196enum {
197 CC_MAPPED = 0x01,
198 CC_NOREUSE = 0x02, /* throw this away after tracing */
199 CC_TRACE = 0x04,
200 CC_TRACE_SUB = 0x08, /* trace sub calls */
201 CC_TRACE_LINE = 0x10, /* trace each statement */
202 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
203};
204
205/* this is a structure representing a c-level coroutine */
93typedef struct { 206typedef struct coro_cctx
94 int refcnt; /* pointer reference counter */ 207{
95 int usecnt; /* shared by how many coroutines */ 208 struct coro_cctx *next;
96 int gencnt; /* generation counter */
97 209
210 /* the stack */
211 void *sptr;
212 size_t ssize;
213
214 /* cpu state */
215 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
216 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
217 JMPENV *top_env;
98 coro_context cctx; 218 coro_context cctx;
99 219
100 void *sptr; 220 U32 gen;
101 long ssize; /* positive == mmap, otherwise malloc */ 221#if CORO_USE_VALGRIND
102} coro_stack; 222 int valgrind_id;
223#endif
224 unsigned char flags;
225} coro_cctx;
103 226
227enum {
228 CF_RUNNING = 0x0001, /* coroutine is running */
229 CF_READY = 0x0002, /* coroutine is ready */
230 CF_NEW = 0x0004, /* has never been switched to */
231 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
232};
233
234/* the structure where most of the perl state is stored, overlaid on the cxstack */
235typedef struct
236{
237 SV *defsv;
238 AV *defav;
239 SV *errsv;
240 SV *irsgv;
241#define VAR(name,type) type name;
242# include "state.h"
243#undef VAR
244} perl_slots;
245
246#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
247
248/* this is a structure representing a perl-level coroutine */
104struct coro { 249struct coro {
105 /* the top-level JMPENV for each coroutine, needed to catch dies. */ 250 /* the C coroutine allocated to this perl coroutine, if any */
106 JMPENV start_env; 251 coro_cctx *cctx;
107 252
108 /* the optional C context */ 253 /* state data */
109 coro_stack *stack; 254 struct CoroSLF slf_frame; /* saved slf frame */
110 void *cursp;
111 int gencnt;
112
113 /* optionally saved, might be zero */
114 AV *defav;
115 SV *defsv;
116 SV *errsv;
117
118 /* saved global state not related to stacks */
119 U8 dowarn;
120 I32 in_eval;
121
122 /* the stacks and related info (callchain etc..) */
123 PERL_SI *curstackinfo;
124 AV *curstack;
125 AV *mainstack; 255 AV *mainstack;
126 SV **stack_sp; 256 perl_slots *slot; /* basically the saved sp */
127 OP *op;
128 SV **curpad;
129 AV *comppad;
130 CV *compcv;
131 SV **stack_base;
132 SV **stack_max;
133 SV **tmps_stack;
134 I32 tmps_floor;
135 I32 tmps_ix;
136 I32 tmps_max;
137 I32 *markstack;
138 I32 *markstack_ptr;
139 I32 *markstack_max;
140 I32 *scopestack;
141 I32 scopestack_ix;
142 I32 scopestack_max;
143 ANY *savestack;
144 I32 savestack_ix;
145 I32 savestack_max;
146 OP **retstack;
147 I32 retstack_ix;
148 I32 retstack_max;
149 PMOP *curpm;
150 COP *curcop;
151 JMPENV *top_env;
152 257
258 CV *startcv; /* the CV to execute */
153 /* data associated with this coroutine (initial args) */ 259 AV *args; /* data associated with this coroutine (initial args) */
154 AV *args; 260 int refcnt; /* coroutines are refcounted, yes */
261 int flags; /* CF_ flags */
262 HV *hv; /* the perl hash associated with this coro, if any */
263 void (*on_destroy)(pTHX_ struct coro *coro);
264
265 /* statistics */
266 int usecount; /* number of transfers to this coro */
267
268 /* coro process data */
269 int prio;
270 SV *except; /* exception to be thrown */
271 SV *rouse_cb;
272
273 /* async_pool */
274 SV *saved_deffh;
275 SV *invoke_cb;
276 AV *invoke_av;
277
278 /* linked list */
279 struct coro *next, *prev;
155}; 280};
156 281
157typedef struct coro *Coro__State; 282typedef struct coro *Coro__State;
158typedef struct coro *Coro__State_or_hashref; 283typedef struct coro *Coro__State_or_hashref;
159 284
285/* the following variables are effectively part of the perl context */
286/* and get copied between struct coro and these variables */
287/* the mainr easonw e don't support windows process emulation */
288static struct CoroSLF slf_frame; /* the current slf frame */
289
290/** Coro ********************************************************************/
291
292#define PRIO_MAX 3
293#define PRIO_HIGH 1
294#define PRIO_NORMAL 0
295#define PRIO_LOW -1
296#define PRIO_IDLE -3
297#define PRIO_MIN -4
298
299/* for Coro.pm */
300static SV *coro_current;
301static SV *coro_readyhook;
302static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
303static CV *cv_coro_run, *cv_coro_terminate;
304static struct coro *coro_first;
305#define coro_nready coroapi.nready
306
307/** lowlevel stuff **********************************************************/
308
309static SV *
310coro_get_sv (pTHX_ const char *name, int create)
311{
312#if PERL_VERSION_ATLEAST (5,10,0)
313 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
314 get_sv (name, create);
315#endif
316 return get_sv (name, create);
317}
318
319static AV *
320coro_get_av (pTHX_ const char *name, int create)
321{
322#if PERL_VERSION_ATLEAST (5,10,0)
323 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
324 get_av (name, create);
325#endif
326 return get_av (name, create);
327}
328
329static HV *
330coro_get_hv (pTHX_ const char *name, int create)
331{
332#if PERL_VERSION_ATLEAST (5,10,0)
333 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
334 get_hv (name, create);
335#endif
336 return get_hv (name, create);
337}
338
339/* may croak */
340INLINE CV *
341coro_sv_2cv (pTHX_ SV *sv)
342{
343 HV *st;
344 GV *gvp;
345 return sv_2cv (sv, &st, &gvp, 0);
346}
347
160static AV * 348static AV *
161coro_clone_padlist (pTHX_ CV *cv) 349coro_clone_padlist (pTHX_ CV *cv)
162{ 350{
163 AV *padlist = CvPADLIST (cv); 351 AV *padlist = CvPADLIST (cv);
164 AV *newpadlist, *newpad; 352 AV *newpadlist, *newpad;
165 353
166 newpadlist = newAV (); 354 newpadlist = newAV ();
167 AvREAL_off (newpadlist); 355 AvREAL_off (newpadlist);
168#if PERL_VERSION < 9 356#if PERL_VERSION_ATLEAST (5,10,0)
357 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
358#else
169 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 359 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
170#else
171 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
172#endif 360#endif
173 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 361 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
174 --AvFILLp (padlist); 362 --AvFILLp (padlist);
175 363
176 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 364 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
177 av_store (newpadlist, 1, (SV *)newpad); 365 av_store (newpadlist, 1, (SV *)newpad);
178 366
179 return newpadlist; 367 return newpadlist;
180} 368}
181 369
… …
211 399
212 /* casting is fun. */ 400 /* casting is fun. */
213 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 401 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
214 free_padlist (aTHX_ padlist); 402 free_padlist (aTHX_ padlist);
215 403
216 SvREFCNT_dec (av); 404 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
217 405
218 return 0; 406 return 0;
219} 407}
220 408
409#define CORO_MAGIC_type_cv 26
221#define PERL_MAGIC_coro PERL_MAGIC_ext 410#define CORO_MAGIC_type_state PERL_MAGIC_ext
222 411
223static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 412static MGVTBL coro_cv_vtbl = {
413 0, 0, 0, 0,
414 coro_cv_free
415};
416
417#define CORO_MAGIC_NN(sv, type) \
418 (expect_true (SvMAGIC (sv)->mg_type == type) \
419 ? SvMAGIC (sv) \
420 : mg_find (sv, type))
421
422#define CORO_MAGIC(sv, type) \
423 (expect_true (SvMAGIC (sv)) \
424 ? CORO_MAGIC_NN (sv, type) \
425 : 0)
426
427#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
428#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
429
430INLINE struct coro *
431SvSTATE_ (pTHX_ SV *coro)
432{
433 HV *stash;
434 MAGIC *mg;
435
436 if (SvROK (coro))
437 coro = SvRV (coro);
438
439 if (expect_false (SvTYPE (coro) != SVt_PVHV))
440 croak ("Coro::State object required");
441
442 stash = SvSTASH (coro);
443 if (expect_false (stash != coro_stash && stash != coro_state_stash))
444 {
445 /* very slow, but rare, check */
446 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
447 croak ("Coro::State object required");
448 }
449
450 mg = CORO_MAGIC_state (coro);
451 return (struct coro *)mg->mg_ptr;
452}
453
454#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
455
456/* faster than SvSTATE, but expects a coroutine hv */
457#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
458#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
224 459
225/* the next two functions merely cache the padlists */ 460/* the next two functions merely cache the padlists */
226static void 461static void
227get_padlist (pTHX_ CV *cv) 462get_padlist (pTHX_ CV *cv)
228{ 463{
229 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 464 MAGIC *mg = CORO_MAGIC_cv (cv);
465 AV *av;
230 466
231 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0) 467 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
232 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj); 468 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
233 else 469 else
234 { 470 {
235#if 0 471#if CORO_PREFER_PERL_FUNCTIONS
236 /* this should work - but it doesn't :( */ 472 /* this is probably cleaner? but also slower! */
473 /* in practise, it seems to be less stable */
237 CV *cp = Perl_cv_clone (aTHX_ cv); 474 CV *cp = Perl_cv_clone (aTHX_ cv);
238 CvPADLIST (cv) = CvPADLIST (cp); 475 CvPADLIST (cv) = CvPADLIST (cp);
239 CvPADLIST (cp) = 0; 476 CvPADLIST (cp) = 0;
240 SvREFCNT_dec (cp); 477 SvREFCNT_dec (cp);
241#else 478#else
… …
245} 482}
246 483
247static void 484static void
248put_padlist (pTHX_ CV *cv) 485put_padlist (pTHX_ CV *cv)
249{ 486{
250 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 487 MAGIC *mg = CORO_MAGIC_cv (cv);
488 AV *av;
251 489
252 if (!mg) 490 if (expect_false (!mg))
253 { 491 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
254 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
255 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
256 mg->mg_virtual = &vtbl_coro;
257 mg->mg_obj = (SV *)newAV ();
258 }
259 492
260 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv)); 493 av = (AV *)mg->mg_obj;
261}
262 494
263#define SB do { 495 if (expect_false (AvFILLp (av) >= AvMAX (av)))
264#define SE } while (0) 496 av_extend (av, AvMAX (av) + 1);
265 497
266#define LOAD(state) load_state(aTHX_ (state)); 498 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
267#define SAVE(state,flags) save_state(aTHX_ (state),(flags)); 499}
268 500
269#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE 501/** load & save, init *******************************************************/
270 502
271static void 503static void
272load_state(pTHX_ Coro__State c) 504load_perl (pTHX_ Coro__State c)
273{ 505{
274 PL_dowarn = c->dowarn; 506 perl_slots *slot = c->slot;
275 PL_in_eval = c->in_eval; 507 c->slot = 0;
276 508
277 PL_curstackinfo = c->curstackinfo;
278 PL_curstack = c->curstack;
279 PL_mainstack = c->mainstack; 509 PL_mainstack = c->mainstack;
280 PL_stack_sp = c->stack_sp;
281 PL_op = c->op;
282 PL_curpad = c->curpad;
283 PL_comppad = c->comppad;
284 PL_compcv = c->compcv;
285 PL_stack_base = c->stack_base;
286 PL_stack_max = c->stack_max;
287 PL_tmps_stack = c->tmps_stack;
288 PL_tmps_floor = c->tmps_floor;
289 PL_tmps_ix = c->tmps_ix;
290 PL_tmps_max = c->tmps_max;
291 PL_markstack = c->markstack;
292 PL_markstack_ptr = c->markstack_ptr;
293 PL_markstack_max = c->markstack_max;
294 PL_scopestack = c->scopestack;
295 PL_scopestack_ix = c->scopestack_ix;
296 PL_scopestack_max = c->scopestack_max;
297 PL_savestack = c->savestack;
298 PL_savestack_ix = c->savestack_ix;
299 PL_savestack_max = c->savestack_max;
300#if PERL_VERSION < 9
301 PL_retstack = c->retstack;
302 PL_retstack_ix = c->retstack_ix;
303 PL_retstack_max = c->retstack_max;
304#endif
305 PL_curpm = c->curpm;
306 PL_curcop = c->curcop;
307 PL_top_env = c->top_env;
308 510
309 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 511 GvSV (PL_defgv) = slot->defsv;
310 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 512 GvAV (PL_defgv) = slot->defav;
311 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 513 GvSV (PL_errgv) = slot->errsv;
514 GvSV (irsgv) = slot->irsgv;
515
516 #define VAR(name,type) PL_ ## name = slot->name;
517 # include "state.h"
518 #undef VAR
312 519
313 { 520 {
314 dSP; 521 dSP;
522
315 CV *cv; 523 CV *cv;
316 524
317 /* now do the ugly restore mess */ 525 /* now do the ugly restore mess */
318 while ((cv = (CV *)POPs)) 526 while (expect_true (cv = (CV *)POPs))
319 { 527 {
320 AV *padlist = (AV *)POPs;
321
322 if (padlist)
323 {
324 put_padlist (aTHX_ cv); /* mark this padlist as available */ 528 put_padlist (aTHX_ cv); /* mark this padlist as available */
325 CvPADLIST(cv) = padlist; 529 CvDEPTH (cv) = PTR2IV (POPs);
326 } 530 CvPADLIST (cv) = (AV *)POPs;
327
328 ++CvDEPTH(cv);
329 } 531 }
330 532
331 PUTBACK; 533 PUTBACK;
332 } 534 }
333}
334 535
536 slf_frame = c->slf_frame;
537 CORO_THROW = c->except;
538}
539
335static void 540static void
336save_state(pTHX_ Coro__State c, int flags) 541save_perl (pTHX_ Coro__State c)
337{ 542{
543 c->except = CORO_THROW;
544 c->slf_frame = slf_frame;
545
338 { 546 {
339 dSP; 547 dSP;
340 I32 cxix = cxstack_ix; 548 I32 cxix = cxstack_ix;
341 PERL_CONTEXT *ccstk = cxstack; 549 PERL_CONTEXT *ccstk = cxstack;
342 PERL_SI *top_si = PL_curstackinfo; 550 PERL_SI *top_si = PL_curstackinfo;
… …
344 /* 552 /*
345 * the worst thing you can imagine happens first - we have to save 553 * the worst thing you can imagine happens first - we have to save
346 * (and reinitialize) all cv's in the whole callchain :( 554 * (and reinitialize) all cv's in the whole callchain :(
347 */ 555 */
348 556
349 PUSHs (Nullsv); 557 XPUSHs (Nullsv);
350 /* this loop was inspired by pp_caller */ 558 /* this loop was inspired by pp_caller */
351 for (;;) 559 for (;;)
352 { 560 {
353 while (cxix >= 0) 561 while (expect_true (cxix >= 0))
354 { 562 {
355 PERL_CONTEXT *cx = &ccstk[cxix--]; 563 PERL_CONTEXT *cx = &ccstk[cxix--];
356 564
357 if (CxTYPE(cx) == CXt_SUB) 565 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
358 { 566 {
359 CV *cv = cx->blk_sub.cv; 567 CV *cv = cx->blk_sub.cv;
568
360 if (CvDEPTH(cv)) 569 if (expect_true (CvDEPTH (cv)))
361 { 570 {
362 EXTEND (SP, CvDEPTH(cv)*2); 571 EXTEND (SP, 3);
363
364 while (--CvDEPTH(cv))
365 {
366 /* this tells the restore code to increment CvDEPTH */
367 PUSHs (Nullsv);
368 PUSHs ((SV *)cv);
369 }
370
371 PUSHs ((SV *)CvPADLIST(cv)); 572 PUSHs ((SV *)CvPADLIST (cv));
573 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
372 PUSHs ((SV *)cv); 574 PUSHs ((SV *)cv);
373 575
576 CvDEPTH (cv) = 0;
374 get_padlist (aTHX_ cv); 577 get_padlist (aTHX_ cv);
375 } 578 }
376 } 579 }
377#ifdef CXt_FORMAT
378 else if (CxTYPE(cx) == CXt_FORMAT)
379 {
380 /* I never used formats, so how should I know how these are implemented? */
381 /* my bold guess is as a simple, plain sub... */
382 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
383 }
384#endif
385 } 580 }
386 581
387 if (top_si->si_type == PERLSI_MAIN) 582 if (expect_true (top_si->si_type == PERLSI_MAIN))
388 break; 583 break;
389 584
390 top_si = top_si->si_prev; 585 top_si = top_si->si_prev;
391 ccstk = top_si->si_cxstack; 586 ccstk = top_si->si_cxstack;
392 cxix = top_si->si_cxix; 587 cxix = top_si->si_cxix;
393 } 588 }
394 589
395 PUTBACK; 590 PUTBACK;
396 } 591 }
397 592
398 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 593 /* allocate some space on the context stack for our purposes */
399 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 594 /* we manually unroll here, as usually 2 slots is enough */
400 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 595 if (SLOT_COUNT >= 1) CXINC;
596 if (SLOT_COUNT >= 2) CXINC;
597 if (SLOT_COUNT >= 3) CXINC;
598 {
599 int i;
600 for (i = 3; i < SLOT_COUNT; ++i)
601 CXINC;
602 }
603 cxstack_ix -= SLOT_COUNT; /* undo allocation */
401 604
402 c->dowarn = PL_dowarn;
403 c->in_eval = PL_in_eval;
404
405 c->curstackinfo = PL_curstackinfo;
406 c->curstack = PL_curstack;
407 c->mainstack = PL_mainstack; 605 c->mainstack = PL_mainstack;
408 c->stack_sp = PL_stack_sp; 606
409 c->op = PL_op; 607 {
410 c->curpad = PL_curpad; 608 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
411 c->comppad = PL_comppad; 609
412 c->compcv = PL_compcv; 610 slot->defav = GvAV (PL_defgv);
413 c->stack_base = PL_stack_base; 611 slot->defsv = DEFSV;
414 c->stack_max = PL_stack_max; 612 slot->errsv = ERRSV;
415 c->tmps_stack = PL_tmps_stack; 613 slot->irsgv = GvSV (irsgv);
416 c->tmps_floor = PL_tmps_floor; 614
417 c->tmps_ix = PL_tmps_ix; 615 #define VAR(name,type) slot->name = PL_ ## name;
418 c->tmps_max = PL_tmps_max; 616 # include "state.h"
419 c->markstack = PL_markstack; 617 #undef VAR
420 c->markstack_ptr = PL_markstack_ptr; 618 }
421 c->markstack_max = PL_markstack_max;
422 c->scopestack = PL_scopestack;
423 c->scopestack_ix = PL_scopestack_ix;
424 c->scopestack_max = PL_scopestack_max;
425 c->savestack = PL_savestack;
426 c->savestack_ix = PL_savestack_ix;
427 c->savestack_max = PL_savestack_max;
428#if PERL_VERSION < 9
429 c->retstack = PL_retstack;
430 c->retstack_ix = PL_retstack_ix;
431 c->retstack_max = PL_retstack_max;
432#endif
433 c->curpm = PL_curpm;
434 c->curcop = PL_curcop;
435 c->top_env = PL_top_env;
436} 619}
437 620
438/* 621/*
439 * allocate various perl stacks. This is an exact copy 622 * allocate various perl stacks. This is almost an exact copy
440 * of perl.c:init_stacks, except that it uses less memory 623 * of perl.c:init_stacks, except that it uses less memory
441 * on the (sometimes correct) assumption that coroutines do 624 * on the (sometimes correct) assumption that coroutines do
442 * not usually need a lot of stackspace. 625 * not usually need a lot of stackspace.
443 */ 626 */
627#if CORO_PREFER_PERL_FUNCTIONS
628# define coro_init_stacks(thx) init_stacks ()
629#else
444static void 630static void
445coro_init_stacks (pTHX) 631coro_init_stacks (pTHX)
446{ 632{
447 LOCK; 633 PL_curstackinfo = new_stackinfo(32, 8);
448
449 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
450 PL_curstackinfo->si_type = PERLSI_MAIN; 634 PL_curstackinfo->si_type = PERLSI_MAIN;
451 PL_curstack = PL_curstackinfo->si_stack; 635 PL_curstack = PL_curstackinfo->si_stack;
452 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 636 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
453 637
454 PL_stack_base = AvARRAY(PL_curstack); 638 PL_stack_base = AvARRAY(PL_curstack);
455 PL_stack_sp = PL_stack_base; 639 PL_stack_sp = PL_stack_base;
456 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 640 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
457 641
458 New(50,PL_tmps_stack,96,SV*); 642 New(50,PL_tmps_stack,32,SV*);
459 PL_tmps_floor = -1; 643 PL_tmps_floor = -1;
460 PL_tmps_ix = -1; 644 PL_tmps_ix = -1;
461 PL_tmps_max = 96; 645 PL_tmps_max = 32;
462 646
463 New(54,PL_markstack,16,I32); 647 New(54,PL_markstack,16,I32);
464 PL_markstack_ptr = PL_markstack; 648 PL_markstack_ptr = PL_markstack;
465 PL_markstack_max = PL_markstack + 16; 649 PL_markstack_max = PL_markstack + 16;
466 650
467#ifdef SET_MARK_OFFSET 651#ifdef SET_MARK_OFFSET
468 SET_MARK_OFFSET; 652 SET_MARK_OFFSET;
469#endif 653#endif
470 654
471 New(54,PL_scopestack,16,I32); 655 New(54,PL_scopestack,8,I32);
472 PL_scopestack_ix = 0; 656 PL_scopestack_ix = 0;
473 PL_scopestack_max = 16; 657 PL_scopestack_max = 8;
474 658
475 New(54,PL_savestack,96,ANY); 659 New(54,PL_savestack,24,ANY);
476 PL_savestack_ix = 0; 660 PL_savestack_ix = 0;
477 PL_savestack_max = 96; 661 PL_savestack_max = 24;
478 662
479#if PERL_VERSION < 9 663#if !PERL_VERSION_ATLEAST (5,10,0)
480 New(54,PL_retstack,8,OP*); 664 New(54,PL_retstack,4,OP*);
481 PL_retstack_ix = 0; 665 PL_retstack_ix = 0;
482 PL_retstack_max = 8; 666 PL_retstack_max = 4;
483#endif 667#endif
484
485 UNLOCK;
486} 668}
669#endif
487 670
488/* 671/*
489 * destroy the stacks, the callchain etc... 672 * destroy the stacks, the callchain etc...
490 */ 673 */
491static void 674static void
492destroy_stacks(pTHX) 675coro_destruct_stacks (pTHX)
493{ 676{
494 if (!IN_DESTRUCT)
495 {
496 /* is this ugly, I ask? */
497 LEAVE_SCOPE (0);
498
499 /* sure it is, but more important: is it correct?? :/ */
500 FREETMPS;
501
502 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
503 }
504
505 while (PL_curstackinfo->si_next) 677 while (PL_curstackinfo->si_next)
506 PL_curstackinfo = PL_curstackinfo->si_next; 678 PL_curstackinfo = PL_curstackinfo->si_next;
507 679
508 while (PL_curstackinfo) 680 while (PL_curstackinfo)
509 { 681 {
510 PERL_SI *p = PL_curstackinfo->si_prev; 682 PERL_SI *p = PL_curstackinfo->si_prev;
511 683
512 { /*D*//*remove*/
513 dSP;
514 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
515 PUTBACK; /* possibly superfluous */
516 }
517
518 if (!IN_DESTRUCT) 684 if (!IN_DESTRUCT)
519 {
520 dounwind (-1);/*D*//*remove*/
521 SvREFCNT_dec (PL_curstackinfo->si_stack); 685 SvREFCNT_dec (PL_curstackinfo->si_stack);
522 }
523 686
524 Safefree (PL_curstackinfo->si_cxstack); 687 Safefree (PL_curstackinfo->si_cxstack);
525 Safefree (PL_curstackinfo); 688 Safefree (PL_curstackinfo);
526 PL_curstackinfo = p; 689 PL_curstackinfo = p;
527 } 690 }
528 691
529 Safefree (PL_tmps_stack); 692 Safefree (PL_tmps_stack);
530 Safefree (PL_markstack); 693 Safefree (PL_markstack);
531 Safefree (PL_scopestack); 694 Safefree (PL_scopestack);
532 Safefree (PL_savestack); 695 Safefree (PL_savestack);
533#if PERL_VERSION < 9 696#if !PERL_VERSION_ATLEAST (5,10,0)
534 Safefree (PL_retstack); 697 Safefree (PL_retstack);
535#endif 698#endif
536} 699}
537 700
538static void 701#define CORO_RSS \
539allocate_stack (Coro__State ctx, int alloc) 702 rss += sizeof (SYM (curstackinfo)); \
540{ 703 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
541 coro_stack *stack; 704 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
705 rss += SYM (tmps_max) * sizeof (SV *); \
706 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
707 rss += SYM (scopestack_max) * sizeof (I32); \
708 rss += SYM (savestack_max) * sizeof (ANY);
542 709
543 New (0, stack, 1, coro_stack); 710static size_t
711coro_rss (pTHX_ struct coro *coro)
712{
713 size_t rss = sizeof (*coro);
544 714
545 stack->refcnt = 1; 715 if (coro->mainstack)
546 stack->usecnt = 1;
547 stack->gencnt = ctx->gencnt = 0;
548
549 if (alloc)
550 { 716 {
551#if HAVE_MMAP 717 if (coro->flags & CF_RUNNING)
552 stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; /* mmap should do allocate-on-write for us */
553 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
554 if (stack->sptr != (void *)-1)
555 { 718 {
556# if STACKGUARD 719 #define SYM(sym) PL_ ## sym
557 mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE); 720 CORO_RSS;
558# endif 721 #undef SYM
559 } 722 }
560 else 723 else
561#endif
562 { 724 {
563 stack->ssize = - (STACKSIZE * (long)sizeof (long)); 725 #define SYM(sym) coro->slot->sym
564 New (0, stack->sptr, STACKSIZE, long); 726 CORO_RSS;
727 #undef SYM
565 } 728 }
566 } 729 }
567 else
568 stack->sptr = 0;
569 730
570 ctx->stack = stack; 731 return rss;
571} 732}
572 733
734/** coroutine stack handling ************************************************/
735
736static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
737static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
738static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
739
740/* apparently < 5.8.8 */
741#ifndef MgPV_nolen_const
742#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
743 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
744 (const char*)(mg)->mg_ptr)
745#endif
746
747/*
748 * This overrides the default magic get method of %SIG elements.
749 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
750 * and instead of tryign to save and restore the hash elements, we just provide
751 * readback here.
752 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
753 * not expecting this to actually change the hook. This is a potential problem
754 * when a schedule happens then, but we ignore this.
755 */
573static void 756static int
574deallocate_stack (Coro__State ctx) 757coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
575{ 758{
576 coro_stack *stack = ctx->stack; 759 const char *s = MgPV_nolen_const (mg);
577 760
578 ctx->stack = 0; 761 if (*s == '_')
579
580 if (stack)
581 { 762 {
582 if (!--stack->refcnt) 763 SV **svp = 0;
764
765 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
766 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
767
768 if (svp)
583 { 769 {
584#ifdef HAVE_MMAP 770 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
585 if (stack->ssize > 0 && stack->sptr) 771 return 0;
586 munmap (stack->sptr, stack->ssize);
587 else
588#endif
589 Safefree (stack->sptr);
590
591 Safefree (stack);
592 } 772 }
593 else if (ctx->gencnt == stack->gencnt) 773 }
594 --stack->usecnt; 774
775 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
776}
777
778static int
779coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
780{
781 const char *s = MgPV_nolen_const (mg);
782
783 if (*s == '_')
595 } 784 {
596} 785 SV **svp = 0;
597 786
787 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
788 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
789
790 if (svp)
791 {
792 SV *old = *svp;
793 *svp = 0;
794 SvREFCNT_dec (old);
795 return 0;
796 }
797 }
798
799 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
800}
801
598static void 802static int
599setup_coro (void *arg) 803coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
804{
805 const char *s = MgPV_nolen_const (mg);
806
807 if (*s == '_')
808 {
809 SV **svp = 0;
810
811 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
812 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
813
814 if (svp)
815 {
816 SV *old = *svp;
817 *svp = newSVsv (sv);
818 SvREFCNT_dec (old);
819 return 0;
820 }
821 }
822
823 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
824}
825
826static void
827prepare_nop (pTHX_ struct coro_transfer_args *ta)
828{
829 /* kind of mega-hacky, but works */
830 ta->next = ta->prev = (struct coro *)ta;
831}
832
833static int
834slf_check_nop (pTHX_ struct CoroSLF *frame)
835{
836 return 0;
837}
838
839static UNOP coro_setup_op;
840
841static void NOINLINE /* noinline to keep it out of the transfer fast path */
842coro_setup (pTHX_ struct coro *coro)
600{ 843{
601 /* 844 /*
602 * emulate part of the perl startup here. 845 * emulate part of the perl startup here.
603 */ 846 */
604 dTHX;
605 dSP;
606 Coro__State ctx = (Coro__State)arg;
607 SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
608
609 coro_init_stacks (aTHX); 847 coro_init_stacks (aTHX);
610 /*PL_curcop = 0;*/ 848
611 /*PL_in_eval = PL_in_eval;*/ /* inherit */ 849 PL_runops = RUNOPS_DEFAULT;
850 PL_curcop = &PL_compiling;
851 PL_in_eval = EVAL_NULL;
852 PL_comppad = 0;
853 PL_curpm = 0;
854 PL_curpad = 0;
855 PL_localizing = 0;
856 PL_dirty = 0;
857 PL_restartop = 0;
858#if PERL_VERSION_ATLEAST (5,10,0)
859 PL_parser = 0;
860#endif
861
862 /* recreate the die/warn hooks */
863 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
864 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
865
866 GvSV (PL_defgv) = newSV (0);
867 GvAV (PL_defgv) = coro->args; coro->args = 0;
868 GvSV (PL_errgv) = newSV (0);
869 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
870 PL_rs = newSVsv (GvSV (irsgv));
871 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
872
873 {
874 dSP;
875 UNOP myop;
876
877 Zero (&myop, 1, UNOP);
878 myop.op_next = Nullop;
879 myop.op_type = OP_ENTERSUB;
880 myop.op_flags = OPf_WANT_VOID;
881
882 PUSHMARK (SP);
883 PUSHs ((SV *)coro->startcv);
884 PUTBACK;
885 PL_op = (OP *)&myop;
886 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
887 }
888
889 /* this newly created coroutine might be run on an existing cctx which most
890 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
891 */
892 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
893 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
894
895 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
896 coro_setup_op.op_next = PL_op;
897 coro_setup_op.op_type = OP_CUSTOM;
898 coro_setup_op.op_ppaddr = pp_slf;
899 /* no flags etc. required, as an init function won't be called */
900
901 PL_op = (OP *)&coro_setup_op;
902
903 /* copy throw, in case it was set before coro_setup */
904 CORO_THROW = coro->except;
905}
906
907static void
908coro_destruct (pTHX_ struct coro *coro)
909{
910 if (!IN_DESTRUCT)
911 {
912 /* restore all saved variables and stuff */
913 LEAVE_SCOPE (0);
914 assert (PL_tmps_floor == -1);
915
916 /* free all temporaries */
917 FREETMPS;
918 assert (PL_tmps_ix == -1);
919
920 /* unwind all extra stacks */
921 POPSTACK_TO (PL_mainstack);
922
923 /* unwind main stack */
924 dounwind (-1);
925 }
926
927 SvREFCNT_dec (GvSV (PL_defgv));
612 SvREFCNT_dec (GvAV (PL_defgv)); 928 SvREFCNT_dec (GvAV (PL_defgv));
613 GvAV (PL_defgv) = ctx->args; ctx->args = 0; 929 SvREFCNT_dec (GvSV (PL_errgv));
930 SvREFCNT_dec (PL_defoutgv);
931 SvREFCNT_dec (PL_rs);
932 SvREFCNT_dec (GvSV (irsgv));
614 933
615 SPAGAIN; 934 SvREFCNT_dec (PL_diehook);
935 SvREFCNT_dec (PL_warnhook);
936
937 SvREFCNT_dec (coro->saved_deffh);
938 SvREFCNT_dec (coro->rouse_cb);
939 SvREFCNT_dec (coro->invoke_cb);
940 SvREFCNT_dec (coro->invoke_av);
616 941
942 coro_destruct_stacks (aTHX);
943}
944
945INLINE void
946free_coro_mortal (pTHX)
947{
948 if (expect_true (coro_mortal))
949 {
950 SvREFCNT_dec (coro_mortal);
951 coro_mortal = 0;
952 }
953}
954
955static int
956runops_trace (pTHX)
957{
958 COP *oldcop = 0;
959 int oldcxix = -2;
960 struct coro *coro = SvSTATE_current; /* trace cctx is tied to specific coro */
961 coro_cctx *cctx = coro->cctx;
962
963 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
964 {
965 PERL_ASYNC_CHECK ();
966
967 if (cctx->flags & CC_TRACE_ALL)
968 {
969 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
970 {
971 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
972 SV **bot, **top;
973 AV *av = newAV (); /* return values */
974 SV **cb;
975 dSP;
976
977 GV *gv = CvGV (cx->blk_sub.cv);
978 SV *fullname = sv_2mortal (newSV (0));
979 if (isGV (gv))
980 gv_efullname3 (fullname, gv, 0);
981
982 bot = PL_stack_base + cx->blk_oldsp + 1;
983 top = cx->blk_gimme == G_ARRAY ? SP + 1
984 : cx->blk_gimme == G_SCALAR ? bot + 1
985 : bot;
986
987 av_extend (av, top - bot);
988 while (bot < top)
989 av_push (av, SvREFCNT_inc_NN (*bot++));
990
991 PL_runops = RUNOPS_DEFAULT;
992 ENTER;
993 SAVETMPS;
994 EXTEND (SP, 3);
995 PUSHMARK (SP);
996 PUSHs (&PL_sv_no);
997 PUSHs (fullname);
998 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
999 PUTBACK;
1000 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1001 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1002 SPAGAIN;
1003 FREETMPS;
1004 LEAVE;
1005 PL_runops = runops_trace;
1006 }
1007
1008 if (oldcop != PL_curcop)
1009 {
1010 oldcop = PL_curcop;
1011
1012 if (PL_curcop != &PL_compiling)
1013 {
1014 SV **cb;
1015
1016 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
1017 {
1018 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1019
1020 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1021 {
1022 runops_proc_t old_runops = PL_runops;
1023 dSP;
1024 GV *gv = CvGV (cx->blk_sub.cv);
1025 SV *fullname = sv_2mortal (newSV (0));
1026
1027 if (isGV (gv))
1028 gv_efullname3 (fullname, gv, 0);
1029
1030 PL_runops = RUNOPS_DEFAULT;
1031 ENTER;
1032 SAVETMPS;
1033 EXTEND (SP, 3);
1034 PUSHMARK (SP);
1035 PUSHs (&PL_sv_yes);
1036 PUSHs (fullname);
1037 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1038 PUTBACK;
1039 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1040 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1041 SPAGAIN;
1042 FREETMPS;
1043 LEAVE;
1044 PL_runops = runops_trace;
1045 }
1046
1047 oldcxix = cxstack_ix;
1048 }
1049
1050 if (cctx->flags & CC_TRACE_LINE)
1051 {
1052 dSP;
1053
1054 PL_runops = RUNOPS_DEFAULT;
1055 ENTER;
1056 SAVETMPS;
1057 EXTEND (SP, 3);
1058 PL_runops = RUNOPS_DEFAULT;
1059 PUSHMARK (SP);
1060 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1061 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1062 PUTBACK;
1063 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1064 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1065 SPAGAIN;
1066 FREETMPS;
1067 LEAVE;
1068 PL_runops = runops_trace;
1069 }
1070 }
1071 }
1072 }
1073 }
1074
1075 TAINT_NOT;
1076 return 0;
1077}
1078
1079static struct coro_cctx *cctx_ssl_cctx;
1080static struct CoroSLF cctx_ssl_frame;
1081
1082static void
1083slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1084{
1085 ta->prev = (struct coro *)cctx_ssl_cctx;
1086 ta->next = 0;
1087}
1088
1089static int
1090slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1091{
1092 *frame = cctx_ssl_frame;
1093
1094 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1095}
1096
1097/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1098static void NOINLINE
1099cctx_prepare (pTHX_ coro_cctx *cctx)
1100{
1101 PL_top_env = &PL_start_env;
1102
1103 if (cctx->flags & CC_TRACE)
1104 PL_runops = runops_trace;
1105
1106 /* we already must be executing an SLF op, there is no other valid way
1107 * that can lead to creation of a new cctx */
1108 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1109 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1110
1111 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1112 cctx_ssl_cctx = cctx;
1113 cctx_ssl_frame = slf_frame;
1114
1115 slf_frame.prepare = slf_prepare_set_stacklevel;
1116 slf_frame.check = slf_check_set_stacklevel;
1117}
1118
1119/* the tail of transfer: execute stuff we can only do after a transfer */
1120INLINE void
1121transfer_tail (pTHX)
1122{
1123 free_coro_mortal (aTHX);
1124}
1125
1126/*
1127 * this is a _very_ stripped down perl interpreter ;)
1128 */
1129static void
1130cctx_run (void *arg)
1131{
1132#ifdef USE_ITHREADS
1133# if CORO_PTHREAD
1134 PERL_SET_CONTEXT (coro_thx);
1135# endif
1136#endif
1137 {
1138 dTHX;
1139
1140 /* normally we would need to skip the entersub here */
1141 /* not doing so will re-execute it, which is exactly what we want */
1142 /* PL_nop = PL_nop->op_next */
1143
1144 /* inject a fake subroutine call to cctx_init */
1145 cctx_prepare (aTHX_ (coro_cctx *)arg);
1146
1147 /* cctx_run is the alternative tail of transfer() */
1148 transfer_tail (aTHX);
1149
1150 /* somebody or something will hit me for both perl_run and PL_restartop */
1151 PL_restartop = PL_op;
1152 perl_run (PL_curinterp);
1153 /*
1154 * Unfortunately, there is no way to get at the return values of the
1155 * coro body here, as perl_run destroys these
1156 */
1157
1158 /*
1159 * If perl-run returns we assume exit() was being called or the coro
1160 * fell off the end, which seems to be the only valid (non-bug)
1161 * reason for perl_run to return. We try to exit by jumping to the
1162 * bootstrap-time "top" top_env, as we cannot restore the "main"
1163 * coroutine as Coro has no such concept
1164 */
1165 PL_top_env = main_top_env;
1166 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1167 }
1168}
1169
1170static coro_cctx *
1171cctx_new ()
1172{
1173 coro_cctx *cctx;
1174
1175 ++cctx_count;
1176 New (0, cctx, 1, coro_cctx);
1177
1178 cctx->gen = cctx_gen;
1179 cctx->flags = 0;
1180 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1181
1182 return cctx;
1183}
1184
1185/* create a new cctx only suitable as source */
1186static coro_cctx *
1187cctx_new_empty ()
1188{
1189 coro_cctx *cctx = cctx_new ();
1190
1191 cctx->sptr = 0;
1192 coro_create (&cctx->cctx, 0, 0, 0, 0);
1193
1194 return cctx;
1195}
1196
1197/* create a new cctx suitable as destination/running a perl interpreter */
1198static coro_cctx *
1199cctx_new_run ()
1200{
1201 coro_cctx *cctx = cctx_new ();
1202 void *stack_start;
1203 size_t stack_size;
1204
1205#if HAVE_MMAP
1206 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1207 /* mmap supposedly does allocate-on-write for us */
1208 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1209
1210 if (cctx->sptr != (void *)-1)
1211 {
1212 #if CORO_STACKGUARD
1213 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1214 #endif
1215 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1216 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1217 cctx->flags |= CC_MAPPED;
1218 }
1219 else
1220#endif
1221 {
1222 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1223 New (0, cctx->sptr, cctx_stacksize, long);
1224
1225 if (!cctx->sptr)
1226 {
1227 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1228 _exit (EXIT_FAILURE);
1229 }
1230
1231 stack_start = cctx->sptr;
1232 stack_size = cctx->ssize;
1233 }
1234
1235 #if CORO_USE_VALGRIND
1236 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1237 #endif
1238
1239 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1240
1241 return cctx;
1242}
1243
1244static void
1245cctx_destroy (coro_cctx *cctx)
1246{
1247 if (!cctx)
1248 return;
1249
1250 --cctx_count;
1251 coro_destroy (&cctx->cctx);
1252
1253 /* coro_transfer creates new, empty cctx's */
617 if (ctx->stack) 1254 if (cctx->sptr)
1255 {
1256 #if CORO_USE_VALGRIND
1257 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1258 #endif
1259
1260#if HAVE_MMAP
1261 if (cctx->flags & CC_MAPPED)
1262 munmap (cctx->sptr, cctx->ssize);
1263 else
1264#endif
1265 Safefree (cctx->sptr);
618 { 1266 }
619 ctx->cursp = 0;
620 1267
1268 Safefree (cctx);
1269}
1270
1271/* wether this cctx should be destructed */
1272#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1273
1274static coro_cctx *
1275cctx_get (pTHX)
1276{
1277 while (expect_true (cctx_first))
1278 {
1279 coro_cctx *cctx = cctx_first;
1280 cctx_first = cctx->next;
1281 --cctx_idle;
1282
1283 if (expect_true (!CCTX_EXPIRED (cctx)))
1284 return cctx;
1285
1286 cctx_destroy (cctx);
1287 }
1288
1289 return cctx_new_run ();
1290}
1291
1292static void
1293cctx_put (coro_cctx *cctx)
1294{
1295 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1296
1297 /* free another cctx if overlimit */
1298 if (expect_false (cctx_idle >= cctx_max_idle))
1299 {
1300 coro_cctx *first = cctx_first;
1301 cctx_first = first->next;
1302 --cctx_idle;
1303
1304 cctx_destroy (first);
1305 }
1306
1307 ++cctx_idle;
1308 cctx->next = cctx_first;
1309 cctx_first = cctx;
1310}
1311
1312/** coroutine switching *****************************************************/
1313
1314static void
1315transfer_check (pTHX_ struct coro *prev, struct coro *next)
1316{
1317 /* TODO: throwing up here is considered harmful */
1318
1319 if (expect_true (prev != next))
1320 {
1321 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1322 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states,");
1323
1324 if (expect_false (next->flags & CF_RUNNING))
1325 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states,");
1326
1327 if (expect_false (next->flags & CF_DESTROYED))
1328 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states,");
1329
1330#if !PERL_VERSION_ATLEAST (5,10,0)
1331 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1332 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1333#endif
1334 }
1335}
1336
1337/* always use the TRANSFER macro */
1338static void NOINLINE /* noinline so we have a fixed stackframe */
1339transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1340{
1341 dSTACKLEVEL;
1342
1343 /* sometimes transfer is only called to set idle_sp */
1344 if (expect_false (!next))
1345 {
1346 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
1347 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1348 }
1349 else if (expect_true (prev != next))
1350 {
1351 coro_cctx *prev__cctx;
1352
1353 if (expect_false (prev->flags & CF_NEW))
1354 {
1355 /* create a new empty/source context */
1356 prev->cctx = cctx_new_empty ();
1357 prev->flags &= ~CF_NEW;
1358 prev->flags |= CF_RUNNING;
1359 }
1360
1361 prev->flags &= ~CF_RUNNING;
1362 next->flags |= CF_RUNNING;
1363
1364 /* first get rid of the old state */
1365 save_perl (aTHX_ prev);
1366
1367 if (expect_false (next->flags & CF_NEW))
1368 {
1369 /* need to start coroutine */
1370 next->flags &= ~CF_NEW;
1371 /* setup coroutine call */
1372 coro_setup (aTHX_ next);
1373 }
1374 else
1375 load_perl (aTHX_ next);
1376
1377 prev__cctx = prev->cctx;
1378
1379 /* possibly untie and reuse the cctx */
1380 if (expect_true (
1381 prev__cctx->idle_sp == STACKLEVEL
1382 && !(prev__cctx->flags & CC_TRACE)
1383 && !force_cctx
1384 ))
1385 {
1386 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1387 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te));
1388
1389 prev->cctx = 0;
1390
1391 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1392 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1393 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1394 if (!next->cctx)
1395 next->cctx = cctx_get (aTHX);
1396
1397 cctx_put (prev__cctx);
1398 }
1399
1400 ++next->usecount;
1401
1402 if (expect_true (!next->cctx))
1403 next->cctx = cctx_get (aTHX);
1404
1405 if (expect_false (prev__cctx != next->cctx))
1406 {
1407 prev__cctx->top_env = PL_top_env;
1408 PL_top_env = next->cctx->top_env;
1409 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1410 }
1411
1412 transfer_tail (aTHX);
1413 }
1414}
1415
1416#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1417#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1418
1419/** high level stuff ********************************************************/
1420
1421static int
1422coro_state_destroy (pTHX_ struct coro *coro)
1423{
1424 if (coro->flags & CF_DESTROYED)
1425 return 0;
1426
1427 if (coro->on_destroy)
1428 coro->on_destroy (aTHX_ coro);
1429
1430 coro->flags |= CF_DESTROYED;
1431
1432 if (coro->flags & CF_READY)
1433 {
1434 /* reduce nready, as destroying a ready coro effectively unreadies it */
1435 /* alternative: look through all ready queues and remove the coro */
1436 --coro_nready;
1437 }
1438 else
1439 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1440
1441 if (coro->mainstack && coro->mainstack != main_mainstack)
1442 {
1443 struct coro temp;
1444
1445 assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
1446
1447 save_perl (aTHX_ &temp);
1448 load_perl (aTHX_ coro);
1449
1450 coro_destruct (aTHX_ coro);
1451
1452 load_perl (aTHX_ &temp);
1453
1454 coro->slot = 0;
1455 }
1456
1457 cctx_destroy (coro->cctx);
1458 SvREFCNT_dec (coro->startcv);
1459 SvREFCNT_dec (coro->args);
1460 SvREFCNT_dec (CORO_THROW);
1461
1462 if (coro->next) coro->next->prev = coro->prev;
1463 if (coro->prev) coro->prev->next = coro->next;
1464 if (coro == coro_first) coro_first = coro->next;
1465
1466 return 1;
1467}
1468
1469static int
1470coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1471{
1472 struct coro *coro = (struct coro *)mg->mg_ptr;
1473 mg->mg_ptr = 0;
1474
1475 coro->hv = 0;
1476
1477 if (--coro->refcnt < 0)
1478 {
1479 coro_state_destroy (aTHX_ coro);
1480 Safefree (coro);
1481 }
1482
1483 return 0;
1484}
1485
1486static int
1487coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1488{
1489 struct coro *coro = (struct coro *)mg->mg_ptr;
1490
1491 ++coro->refcnt;
1492
1493 return 0;
1494}
1495
1496static MGVTBL coro_state_vtbl = {
1497 0, 0, 0, 0,
1498 coro_state_free,
1499 0,
1500#ifdef MGf_DUP
1501 coro_state_dup,
1502#else
1503# define MGf_DUP 0
1504#endif
1505};
1506
1507static void
1508prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1509{
1510 ta->prev = SvSTATE (prev_sv);
1511 ta->next = SvSTATE (next_sv);
1512 TRANSFER_CHECK (*ta);
1513}
1514
1515static void
1516api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1517{
1518 struct coro_transfer_args ta;
1519
1520 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1521 TRANSFER (ta, 1);
1522}
1523
1524/*****************************************************************************/
1525/* gensub: simple closure generation utility */
1526
1527#define GENSUB_ARG CvXSUBANY (cv).any_ptr
1528
1529/* create a closure from XS, returns a code reference */
1530/* the arg can be accessed via GENSUB_ARG from the callback */
1531/* the callback must use dXSARGS/XSRETURN */
1532static SV *
1533gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
1534{
1535 CV *cv = (CV *)newSV (0);
1536
1537 sv_upgrade ((SV *)cv, SVt_PVCV);
1538
1539 CvANON_on (cv);
1540 CvISXSUB_on (cv);
1541 CvXSUB (cv) = xsub;
1542 GENSUB_ARG = arg;
1543
1544 return newRV_noinc ((SV *)cv);
1545}
1546
1547/** Coro ********************************************************************/
1548
1549INLINE void
1550coro_enq (pTHX_ struct coro *coro)
1551{
1552 av_push (coro_ready [coro->prio - PRIO_MIN], SvREFCNT_inc_NN (coro->hv));
1553}
1554
1555INLINE SV *
1556coro_deq (pTHX)
1557{
1558 int prio;
1559
1560 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
1561 if (AvFILLp (coro_ready [prio]) >= 0)
1562 return av_shift (coro_ready [prio]);
1563
1564 return 0;
1565}
1566
1567static int
1568api_ready (pTHX_ SV *coro_sv)
1569{
1570 struct coro *coro;
1571 SV *sv_hook;
1572 void (*xs_hook)(void);
1573
1574 if (SvROK (coro_sv))
1575 coro_sv = SvRV (coro_sv);
1576
1577 coro = SvSTATE (coro_sv);
1578
1579 if (coro->flags & CF_READY)
1580 return 0;
1581
1582 coro->flags |= CF_READY;
1583
1584 sv_hook = coro_nready ? 0 : coro_readyhook;
1585 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1586
1587 coro_enq (aTHX_ coro);
1588 ++coro_nready;
1589
1590 if (sv_hook)
1591 {
1592 dSP;
1593
1594 ENTER;
1595 SAVETMPS;
1596
621 PUSHMARK(SP); 1597 PUSHMARK (SP);
622 PUTBACK; 1598 PUTBACK;
623 (void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL); 1599 call_sv (sv_hook, G_VOID | G_DISCARD);
624 1600
625 if (SvTRUE (ERRSV)) 1601 FREETMPS;
626 croak (NULL); 1602 LEAVE;
627 else
628 croak ("FATAL: CCTXT coroutine returned!");
629 }
630 else
631 { 1603 }
632 UNOP myop;
633 1604
634 PL_op = (OP *)&myop; 1605 if (xs_hook)
1606 xs_hook ();
635 1607
636 Zero(&myop, 1, UNOP); 1608 return 1;
637 myop.op_next = Nullop; 1609}
638 myop.op_flags = OPf_WANT_VOID;
639 1610
640 PUSHMARK(SP); 1611static int
641 XPUSHs (sub_init); 1612api_is_ready (pTHX_ SV *coro_sv)
642 /* 1613{
643 * the next line is slightly wrong, as PL_op->op_next 1614 return !!(SvSTATE (coro_sv)->flags & CF_READY);
644 * is actually being executed so we skip the first op. 1615}
645 * that doesn't matter, though, since it is only
646 * pp_nextstate and we never return...
647 * ah yes, and I don't care anyways ;)
648 */
649 PUTBACK;
650 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
651 SPAGAIN;
652 1616
653 ENTER; /* necessary e.g. for dounwind */ 1617/* expects to own a reference to next->hv */
1618INLINE void
1619prepare_cede_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1620{
1621 SV *prev_sv = SvRV (coro_current);
1622
1623 ta->prev = SvSTATE_hv (prev_sv);
1624 ta->next = next;
1625
1626 TRANSFER_CHECK (*ta);
1627
1628 SvRV_set (coro_current, next->hv);
1629
1630 free_coro_mortal (aTHX);
1631 coro_mortal = prev_sv;
1632}
1633
1634static void
1635prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1636{
1637 for (;;)
654 } 1638 {
655} 1639 SV *next_sv = coro_deq (aTHX);
656 1640
657static void 1641 if (expect_false (!next_sv))
658continue_coro (void *arg)
659{
660 /*
661 * this is a _very_ stripped down perl interpreter ;)
662 */
663 dTHX;
664 Coro__State ctx = (Coro__State)arg;
665
666 PL_top_env = &ctx->start_env;
667
668 ctx->cursp = 0;
669 PL_op = PL_op->op_next;
670 CALLRUNOPS(aTHX);
671
672 abort ();
673}
674
675static void
676transfer (pTHX_ struct coro *prev, struct coro *next, int flags)
677{
678 dSTACKLEVEL;
679
680 if (prev != next)
681 {
682 if (next->mainstack)
683 { 1642 {
1643 /* nothing to schedule: call the idle handler */
684 LOCK; 1644 dSP;
685 SAVE (prev, flags); 1645
686 LOAD (next); 1646 ENTER;
1647 SAVETMPS;
1648
1649 PUSHMARK (SP);
687 UNLOCK; 1650 PUTBACK;
1651 call_sv (get_sv ("Coro::idle", FALSE), G_VOID | G_DISCARD);
688 1652
689 /* mark this state as in-use */ 1653 FREETMPS;
690 next->mainstack = 0; 1654 LEAVE;
691 next->tmps_ix = -2;
692
693 /* stacklevel changed? if yes, grab the stack for us! */
694 if (flags & TRANSFER_SAVE_CCTXT)
695 {
696 if (!prev->stack)
697 allocate_stack (prev, 0);
698 else if (prev->cursp != stacklevel
699 && prev->stack->usecnt > 1)
700 {
701 prev->gencnt = ++prev->stack->gencnt;
702 prev->stack->usecnt = 1;
703 }
704
705 /* has our stack been invalidated? */
706 if (next->stack && next->stack->gencnt != next->gencnt)
707 {
708 deallocate_stack (next);
709 allocate_stack (next, 1);
710 coro_create (&(next->stack->cctx),
711 continue_coro, (void *)next,
712 next->stack->sptr, labs (next->stack->ssize));
713 }
714
715 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
716 prev->cursp = stacklevel;
717 /* don't add any code here */
718 }
719 else
720 next->cursp = stacklevel;
721 } 1655 }
722 else if (next->tmps_ix == -2)
723 croak ("tried to transfer to running coroutine");
724 else 1656 else
725 { 1657 {
726 LOCK; 1658 struct coro *next = SvSTATE_hv (next_sv);
727 SAVE (prev, -1); /* first get rid of the old state */
728 UNLOCK;
729 1659
730 if (flags & TRANSFER_SAVE_CCTXT) 1660 /* cannot transfer to destroyed coros, skip and look for next */
731 { 1661 if (expect_false (next->flags & CF_DESTROYED))
732 if (!prev->stack) 1662 SvREFCNT_dec (next_sv); /* coro_nready has already been taken care of by destroy */
733 allocate_stack (prev, 0);
734
735 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
736 {
737 PL_top_env = &next->start_env;
738
739 setup_coro (next);
740 next->cursp = stacklevel;
741
742 prev->stack->refcnt++;
743 prev->stack->usecnt++;
744 next->stack = prev->stack;
745 next->gencnt = prev->gencnt;
746 }
747 else
748 {
749 assert (!next->stack);
750 allocate_stack (next, 1);
751 coro_create (&(next->stack->cctx),
752 setup_coro, (void *)next,
753 next->stack->sptr, labs (next->stack->ssize));
754 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
755 prev->cursp = stacklevel;
756 /* don't add any code here */
757 }
758 }
759 else 1663 else
760 { 1664 {
761 setup_coro (next); 1665 next->flags &= ~CF_READY;
762 next->cursp = stacklevel; 1666 --coro_nready;
1667
1668 return prepare_cede_to (aTHX_ ta, next);
763 } 1669 }
764 } 1670 }
765 } 1671 }
1672}
766 1673
767 LOCK; 1674INLINE void
1675prepare_cede (pTHX_ struct coro_transfer_args *ta)
1676{
1677 api_ready (aTHX_ coro_current);
1678 prepare_schedule (aTHX_ ta);
1679}
1680
1681INLINE void
1682prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1683{
1684 SV *prev = SvRV (coro_current);
1685
768 if (coro_mortal) 1686 if (coro_nready)
769 {
770 SvREFCNT_dec (coro_mortal);
771 coro_mortal = 0;
772 } 1687 {
773 UNLOCK; 1688 prepare_schedule (aTHX_ ta);
1689 api_ready (aTHX_ prev);
1690 }
1691 else
1692 prepare_nop (aTHX_ ta);
774} 1693}
775 1694
776#define SV_CORO(sv,func) \ 1695static void
777 do { \ 1696api_schedule (pTHX)
778 if (SvROK (sv)) \ 1697{
779 sv = SvRV (sv); \ 1698 struct coro_transfer_args ta;
780 \
781 if (SvTYPE (sv) == SVt_PVHV) \
782 { \
783 HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
784 \
785 if (!he) \
786 croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
787 \
788 (sv) = SvRV (HeVAL(he)); \
789 } \
790 \
791 /* must also be changed inside Coro::Cont::yield */ \
792 if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
793 croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
794 \
795 } while(0)
796 1699
797#define SvSTATE(sv) INT2PTR (struct coro *, SvIV (sv)) 1700 prepare_schedule (aTHX_ &ta);
1701 TRANSFER (ta, 1);
1702}
798 1703
799static void 1704static int
800api_transfer(pTHX_ SV *prev, SV *next, int flags) 1705api_cede (pTHX)
801{ 1706{
802 SV_CORO (prev, "Coro::transfer"); 1707 struct coro_transfer_args ta;
803 SV_CORO (next, "Coro::transfer");
804 1708
805 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags); 1709 prepare_cede (aTHX_ &ta);
806}
807 1710
1711 if (expect_true (ta.prev != ta.next))
1712 {
1713 TRANSFER (ta, 1);
1714 return 1;
1715 }
1716 else
1717 return 0;
1718}
1719
1720static int
1721api_cede_notself (pTHX)
1722{
1723 if (coro_nready)
1724 {
1725 struct coro_transfer_args ta;
1726
1727 prepare_cede_notself (aTHX_ &ta);
1728 TRANSFER (ta, 1);
1729 return 1;
1730 }
1731 else
1732 return 0;
1733}
1734
1735static void
1736api_trace (pTHX_ SV *coro_sv, int flags)
1737{
1738 struct coro *coro = SvSTATE (coro_sv);
1739
1740 if (flags & CC_TRACE)
1741 {
1742 if (!coro->cctx)
1743 coro->cctx = cctx_new_run ();
1744 else if (!(coro->cctx->flags & CC_TRACE))
1745 croak ("cannot enable tracing on coroutine with custom stack,");
1746
1747 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1748 }
1749 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1750 {
1751 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1752
1753 if (coro->flags & CF_RUNNING)
1754 PL_runops = RUNOPS_DEFAULT;
1755 else
1756 coro->slot->runops = RUNOPS_DEFAULT;
1757 }
1758}
1759
808/** Coro ********************************************************************/ 1760/*****************************************************************************/
1761/* async pool handler */
809 1762
810#define PRIO_MAX 3
811#define PRIO_HIGH 1
812#define PRIO_NORMAL 0
813#define PRIO_LOW -1
814#define PRIO_IDLE -3
815#define PRIO_MIN -4
816
817/* for Coro.pm */
818static GV *coro_current, *coro_idle;
819static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
820static int coro_nready;
821
822static void 1763static int
823coro_enq (pTHX_ SV *sv) 1764slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
824{ 1765{
825 SV **xprio; 1766 HV *hv = (HV *)SvRV (coro_current);
826 int prio; 1767 struct coro *coro = (struct coro *)frame->data;
827 1768
1769 if (!coro->invoke_cb)
1770 return 1; /* loop till we have invoke */
1771 else
1772 {
1773 hv_store (hv, "desc", sizeof ("desc") - 1,
1774 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
1775
1776 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
1777
1778 {
1779 dSP;
1780 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
1781 PUTBACK;
1782 }
1783
1784 SvREFCNT_dec (GvAV (PL_defgv));
1785 GvAV (PL_defgv) = coro->invoke_av;
1786 coro->invoke_av = 0;
1787
1788 return 0;
1789 }
1790}
1791
1792static void
1793slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1794{
1795 HV *hv = (HV *)SvRV (coro_current);
1796 struct coro *coro = SvSTATE_hv ((SV *)hv);
1797
1798 if (expect_true (coro->saved_deffh))
1799 {
1800 /* subsequent iteration */
1801 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1802 coro->saved_deffh = 0;
1803
1804 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
1805 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1806 {
1807 coro->invoke_cb = SvREFCNT_inc_NN ((SV *)cv_coro_terminate);
1808 coro->invoke_av = newAV ();
1809
1810 frame->prepare = prepare_nop;
1811 }
1812 else
1813 {
1814 av_clear (GvAV (PL_defgv));
1815 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
1816
1817 coro->prio = 0;
1818
1819 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
1820 api_trace (aTHX_ coro_current, 0);
1821
1822 frame->prepare = prepare_schedule;
1823 av_push (av_async_pool, SvREFCNT_inc (hv));
1824 }
1825 }
1826 else
1827 {
1828 /* first iteration, simply fall through */
1829 frame->prepare = prepare_nop;
1830 }
1831
1832 frame->check = slf_check_pool_handler;
1833 frame->data = (void *)coro;
1834}
1835
1836/*****************************************************************************/
1837/* rouse callback */
1838
1839#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
1840
1841static void
1842coro_rouse_callback (pTHX_ CV *cv)
1843{
1844 dXSARGS;
1845 SV *data = (SV *)GENSUB_ARG;
1846
828 if (SvTYPE (sv) != SVt_PVHV) 1847 if (SvTYPE (SvRV (data)) != SVt_PVAV)
829 croak ("Coro::ready tried to enqueue something that is not a coroutine"); 1848 {
1849 /* first call, set args */
1850 AV *av = newAV ();
1851 SV *coro = SvRV (data);
830 1852
831 xprio = hv_fetch ((HV *)sv, "prio", 4, 0); 1853 SvRV_set (data, (SV *)av);
832 prio = xprio ? SvIV (*xprio) : PRIO_NORMAL; 1854 api_ready (aTHX_ coro);
1855 SvREFCNT_dec (coro);
833 1856
834 prio = prio > PRIO_MAX ? PRIO_MAX 1857 /* better take a full copy of the arguments */
835 : prio < PRIO_MIN ? PRIO_MIN 1858 while (items--)
836 : prio; 1859 av_store (av, items, newSVsv (ST (items)));
1860 }
837 1861
838 av_push (coro_ready [prio - PRIO_MIN], sv); 1862 XSRETURN_EMPTY;
839 coro_nready++; 1863}
1864
1865static int
1866slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
1867{
1868 SV *data = (SV *)frame->data;
1869
1870 if (CORO_THROW)
1871 return 0;
1872
1873 if (SvTYPE (SvRV (data)) != SVt_PVAV)
1874 return 1;
1875
1876 /* now push all results on the stack */
1877 {
1878 dSP;
1879 AV *av = (AV *)SvRV (data);
1880 int i;
1881
1882 EXTEND (SP, AvFILLp (av) + 1);
1883 for (i = 0; i <= AvFILLp (av); ++i)
1884 PUSHs (sv_2mortal (AvARRAY (av)[i]));
1885
1886 /* we have stolen the elements, so ste length to zero and free */
1887 AvFILLp (av) = -1;
1888 av_undef (av);
1889
1890 PUTBACK;
1891 }
1892
1893 return 0;
1894}
1895
1896static void
1897slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1898{
1899 SV *cb;
1900
1901 if (items)
1902 cb = arg [0];
1903 else
1904 {
1905 struct coro *coro = SvSTATE_current;
1906
1907 if (!coro->rouse_cb)
1908 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
1909
1910 cb = sv_2mortal (coro->rouse_cb);
1911 coro->rouse_cb = 0;
1912 }
1913
1914 if (!SvROK (cb)
1915 || SvTYPE (SvRV (cb)) != SVt_PVCV
1916 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
1917 croak ("Coro::rouse_wait called with illegal callback argument,");
1918
1919 {
1920 CV *cv = (CV *)SvRV (cb); /* for GENSUB_ARG */
1921 SV *data = (SV *)GENSUB_ARG;
1922
1923 frame->data = (void *)data;
1924 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
1925 frame->check = slf_check_rouse_wait;
1926 }
840} 1927}
841 1928
842static SV * 1929static SV *
843coro_deq (pTHX_ int min_prio) 1930coro_new_rouse_cb (pTHX)
844{ 1931{
845 int prio = PRIO_MAX - PRIO_MIN; 1932 HV *hv = (HV *)SvRV (coro_current);
1933 struct coro *coro = SvSTATE_hv (hv);
1934 SV *data = newRV_inc ((SV *)hv);
1935 SV *cb = gensub (aTHX_ coro_rouse_callback, (void *)data);
846 1936
847 min_prio -= PRIO_MIN; 1937 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
848 if (min_prio < 0) 1938 SvREFCNT_dec (data); /* magicext increases the refcount */
849 min_prio = 0;
850 1939
851 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 1940 SvREFCNT_dec (coro->rouse_cb);
852 if (av_len (coro_ready[prio]) >= 0) 1941 coro->rouse_cb = SvREFCNT_inc_NN (cb);
1942
1943 return cb;
1944}
1945
1946/*****************************************************************************/
1947/* schedule-like-function opcode (SLF) */
1948
1949static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
1950static const CV *slf_cv;
1951static SV **slf_argv;
1952static int slf_argc, slf_arga; /* count, allocated */
1953static I32 slf_ax; /* top of stack, for restore */
1954
1955/* this restores the stack in the case we patched the entersub, to */
1956/* recreate the stack frame as perl will on following calls */
1957/* since entersub cleared the stack */
1958static OP *
1959pp_restore (pTHX)
1960{
1961 int i;
1962 SV **SP = PL_stack_base + slf_ax;
1963
1964 PUSHMARK (SP);
1965
1966 EXTEND (SP, slf_argc + 1);
1967
1968 for (i = 0; i < slf_argc; ++i)
1969 PUSHs (sv_2mortal (slf_argv [i]));
1970
1971 PUSHs ((SV *)CvGV (slf_cv));
1972
1973 RETURNOP (slf_restore.op_first);
1974}
1975
1976static void
1977slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
1978{
1979 SV **arg = (SV **)slf_frame.data;
1980
1981 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
1982}
1983
1984static void
1985slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1986{
1987 if (items != 2)
1988 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
1989
1990 frame->prepare = slf_prepare_transfer;
1991 frame->check = slf_check_nop;
1992 frame->data = (void *)arg; /* let's hope it will stay valid */
1993}
1994
1995static void
1996slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1997{
1998 frame->prepare = prepare_schedule;
1999 frame->check = slf_check_nop;
2000}
2001
2002static void
2003slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2004{
2005 frame->prepare = prepare_cede;
2006 frame->check = slf_check_nop;
2007}
2008
2009static void
2010slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2011{
2012 frame->prepare = prepare_cede_notself;
2013 frame->check = slf_check_nop;
2014}
2015
2016/*
2017 * these not obviously related functions are all rolled into one
2018 * function to increase chances that they all will call transfer with the same
2019 * stack offset
2020 * SLF stands for "schedule-like-function".
2021 */
2022static OP *
2023pp_slf (pTHX)
2024{
2025 I32 checkmark; /* mark SP to see how many elements check has pushed */
2026
2027 /* set up the slf frame, unless it has already been set-up */
2028 /* the latter happens when a new coro has been started */
2029 /* or when a new cctx was attached to an existing coroutine */
2030 if (expect_true (!slf_frame.prepare))
2031 {
2032 /* first iteration */
2033 dSP;
2034 SV **arg = PL_stack_base + TOPMARK + 1;
2035 int items = SP - arg; /* args without function object */
2036 SV *gv = *sp;
2037
2038 /* do a quick consistency check on the "function" object, and if it isn't */
2039 /* for us, divert to the real entersub */
2040 if (SvTYPE (gv) != SVt_PVGV
2041 || !GvCV (gv)
2042 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2043 return PL_ppaddr[OP_ENTERSUB](aTHX);
2044
2045 if (!(PL_op->op_flags & OPf_STACKED))
853 { 2046 {
854 coro_nready--; 2047 /* ampersand-form of call, use @_ instead of stack */
855 return av_shift (coro_ready[prio]); 2048 AV *av = GvAV (PL_defgv);
2049 arg = AvARRAY (av);
2050 items = AvFILLp (av) + 1;
856 } 2051 }
2052
2053 /* now call the init function, which needs to set up slf_frame */
2054 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2055 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2056
2057 /* pop args */
2058 SP = PL_stack_base + POPMARK;
2059
2060 PUTBACK;
2061 }
2062
2063 /* now that we have a slf_frame, interpret it! */
2064 /* we use a callback system not to make the code needlessly */
2065 /* complicated, but so we can run multiple perl coros from one cctx */
2066
2067 do
2068 {
2069 struct coro_transfer_args ta;
2070
2071 slf_frame.prepare (aTHX_ &ta);
2072 TRANSFER (ta, 0);
2073
2074 checkmark = PL_stack_sp - PL_stack_base;
2075 }
2076 while (slf_frame.check (aTHX_ &slf_frame));
2077
2078 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2079
2080 /* exception handling */
2081 if (expect_false (CORO_THROW))
2082 {
2083 SV *exception = sv_2mortal (CORO_THROW);
2084
2085 CORO_THROW = 0;
2086 sv_setsv (ERRSV, exception);
2087 croak (0);
2088 }
2089
2090 /* return value handling - mostly like entersub */
2091 /* make sure we put something on the stack in scalar context */
2092 if (GIMME_V == G_SCALAR)
2093 {
2094 dSP;
2095 SV **bot = PL_stack_base + checkmark;
2096
2097 if (sp == bot) /* too few, push undef */
2098 bot [1] = &PL_sv_undef;
2099 else if (sp != bot + 1) /* too many, take last one */
2100 bot [1] = *sp;
2101
2102 SP = bot + 1;
2103
2104 PUTBACK;
2105 }
2106
2107 return NORMAL;
2108}
2109
2110static void
2111api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2112{
2113 int i;
2114 SV **arg = PL_stack_base + ax;
2115 int items = PL_stack_sp - arg + 1;
2116
2117 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2118
2119 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2120 && PL_op->op_ppaddr != pp_slf)
2121 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2122
2123 CvFLAGS (cv) |= CVf_SLF;
2124 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2125 slf_cv = cv;
2126
2127 /* we patch the op, and then re-run the whole call */
2128 /* we have to put the same argument on the stack for this to work */
2129 /* and this will be done by pp_restore */
2130 slf_restore.op_next = (OP *)&slf_restore;
2131 slf_restore.op_type = OP_CUSTOM;
2132 slf_restore.op_ppaddr = pp_restore;
2133 slf_restore.op_first = PL_op;
2134
2135 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2136
2137 if (PL_op->op_flags & OPf_STACKED)
2138 {
2139 if (items > slf_arga)
2140 {
2141 slf_arga = items;
2142 free (slf_argv);
2143 slf_argv = malloc (slf_arga * sizeof (SV *));
2144 }
2145
2146 slf_argc = items;
2147
2148 for (i = 0; i < items; ++i)
2149 slf_argv [i] = SvREFCNT_inc (arg [i]);
2150 }
2151 else
2152 slf_argc = 0;
2153
2154 PL_op->op_ppaddr = pp_slf;
2155 PL_op->op_type = OP_CUSTOM; /* maybe we should leave it at entersub? */
2156
2157 PL_op = (OP *)&slf_restore;
2158}
2159
2160/*****************************************************************************/
2161/* PerlIO::cede */
2162
2163typedef struct
2164{
2165 PerlIOBuf base;
2166 NV next, every;
2167} PerlIOCede;
2168
2169static IV
2170PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2171{
2172 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2173
2174 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2175 self->next = nvtime () + self->every;
2176
2177 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2178}
2179
2180static SV *
2181PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2182{
2183 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2184
2185 return newSVnv (self->every);
2186}
2187
2188static IV
2189PerlIOCede_flush (pTHX_ PerlIO *f)
2190{
2191 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2192 double now = nvtime ();
2193
2194 if (now >= self->next)
2195 {
2196 api_cede (aTHX);
2197 self->next = now + self->every;
2198 }
2199
2200 return PerlIOBuf_flush (aTHX_ f);
2201}
2202
2203static PerlIO_funcs PerlIO_cede =
2204{
2205 sizeof(PerlIO_funcs),
2206 "cede",
2207 sizeof(PerlIOCede),
2208 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2209 PerlIOCede_pushed,
2210 PerlIOBuf_popped,
2211 PerlIOBuf_open,
2212 PerlIOBase_binmode,
2213 PerlIOCede_getarg,
2214 PerlIOBase_fileno,
2215 PerlIOBuf_dup,
2216 PerlIOBuf_read,
2217 PerlIOBuf_unread,
2218 PerlIOBuf_write,
2219 PerlIOBuf_seek,
2220 PerlIOBuf_tell,
2221 PerlIOBuf_close,
2222 PerlIOCede_flush,
2223 PerlIOBuf_fill,
2224 PerlIOBase_eof,
2225 PerlIOBase_error,
2226 PerlIOBase_clearerr,
2227 PerlIOBase_setlinebuf,
2228 PerlIOBuf_get_base,
2229 PerlIOBuf_bufsiz,
2230 PerlIOBuf_get_ptr,
2231 PerlIOBuf_get_cnt,
2232 PerlIOBuf_set_ptrcnt,
2233};
2234
2235/*****************************************************************************/
2236/* Coro::Semaphore & Coro::Signal */
2237
2238static SV *
2239coro_waitarray_new (pTHX_ int count)
2240{
2241 /* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
2242 AV *av = newAV ();
2243 SV **ary;
2244
2245 /* unfortunately, building manually saves memory */
2246 Newx (ary, 2, SV *);
2247 AvALLOC (av) = ary;
2248 /*AvARRAY (av) = ary;*/
2249 SvPVX ((SV *)av) = (char *)ary; /* 5.8.8 needs this syntax instead of AvARRAY = ary */
2250 AvMAX (av) = 1;
2251 AvFILLp (av) = 0;
2252 ary [0] = newSViv (count);
2253
2254 return newRV_noinc ((SV *)av);
2255}
2256
2257/* semaphore */
2258
2259static void
2260coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2261{
2262 SV *count_sv = AvARRAY (av)[0];
2263 IV count = SvIVX (count_sv);
2264
2265 count += adjust;
2266 SvIVX (count_sv) = count;
2267
2268 /* now wake up as many waiters as are expected to lock */
2269 while (count > 0 && AvFILLp (av) > 0)
2270 {
2271 SV *cb;
2272
2273 /* swap first two elements so we can shift a waiter */
2274 AvARRAY (av)[0] = AvARRAY (av)[1];
2275 AvARRAY (av)[1] = count_sv;
2276 cb = av_shift (av);
2277
2278 if (SvOBJECT (cb))
2279 {
2280 api_ready (aTHX_ cb);
2281 --count;
2282 }
2283 else if (SvTYPE (cb) == SVt_PVCV)
2284 {
2285 dSP;
2286 PUSHMARK (SP);
2287 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2288 PUTBACK;
2289 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2290 }
2291
2292 SvREFCNT_dec (cb);
2293 }
2294}
2295
2296static void
2297coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2298{
2299 /* call $sem->adjust (0) to possibly wake up some other waiters */
2300 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2301}
2302
2303static int
2304slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2305{
2306 AV *av = (AV *)frame->data;
2307 SV *count_sv = AvARRAY (av)[0];
2308
2309 /* if we are about to throw, don't actually acquire the lock, just throw */
2310 if (CORO_THROW)
2311 return 0;
2312 else if (SvIVX (count_sv) > 0)
2313 {
2314 SvSTATE_current->on_destroy = 0;
2315
2316 if (acquire)
2317 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2318 else
2319 coro_semaphore_adjust (aTHX_ av, 0);
2320
2321 return 0;
2322 }
2323 else
2324 {
2325 int i;
2326 /* if we were woken up but can't down, we look through the whole */
2327 /* waiters list and only add us if we aren't in there already */
2328 /* this avoids some degenerate memory usage cases */
2329
2330 for (i = 1; i <= AvFILLp (av); ++i)
2331 if (AvARRAY (av)[i] == SvRV (coro_current))
2332 return 1;
2333
2334 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2335 return 1;
2336 }
2337}
2338
2339static int
2340slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2341{
2342 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2343}
2344
2345static int
2346slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2347{
2348 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2349}
2350
2351static void
2352slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2353{
2354 AV *av = (AV *)SvRV (arg [0]);
2355
2356 if (SvIVX (AvARRAY (av)[0]) > 0)
2357 {
2358 frame->data = (void *)av;
2359 frame->prepare = prepare_nop;
2360 }
2361 else
2362 {
2363 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2364
2365 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2366 frame->prepare = prepare_schedule;
2367
2368 /* to avoid race conditions when a woken-up coro gets terminated */
2369 /* we arrange for a temporary on_destroy that calls adjust (0) */
2370 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2371 }
2372}
2373
2374static void
2375slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2376{
2377 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2378 frame->check = slf_check_semaphore_down;
2379}
2380
2381static void
2382slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2383{
2384 if (items >= 2)
2385 {
2386 /* callback form */
2387 AV *av = (AV *)SvRV (arg [0]);
2388 CV *cb_cv = coro_sv_2cv (aTHX_ arg [1]);
2389
2390 av_push (av, (SV *)SvREFCNT_inc_NN (cb_cv));
2391
2392 if (SvIVX (AvARRAY (av)[0]) > 0)
2393 coro_semaphore_adjust (aTHX_ av, 0);
2394
2395 frame->prepare = prepare_nop;
2396 frame->check = slf_check_nop;
2397 }
2398 else
2399 {
2400 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2401 frame->check = slf_check_semaphore_wait;
2402 }
2403}
2404
2405/* signal */
2406
2407static void
2408coro_signal_wake (pTHX_ AV *av, int count)
2409{
2410 SvIVX (AvARRAY (av)[0]) = 0;
2411
2412 /* now signal count waiters */
2413 while (count > 0 && AvFILLp (av) > 0)
2414 {
2415 SV *cb;
2416
2417 /* swap first two elements so we can shift a waiter */
2418 cb = AvARRAY (av)[0];
2419 AvARRAY (av)[0] = AvARRAY (av)[1];
2420 AvARRAY (av)[1] = cb;
2421
2422 cb = av_shift (av);
2423
2424 api_ready (aTHX_ cb);
2425 sv_setiv (cb, 0); /* signal waiter */
2426 SvREFCNT_dec (cb);
2427
2428 --count;
2429 }
2430}
2431
2432static int
2433slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
2434{
2435 /* if we are about to throw, also stop waiting */
2436 return SvROK ((SV *)frame->data) && !CORO_THROW;
2437}
2438
2439static void
2440slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2441{
2442 AV *av = (AV *)SvRV (arg [0]);
2443
2444 if (SvIVX (AvARRAY (av)[0]))
2445 {
2446 SvIVX (AvARRAY (av)[0]) = 0;
2447 frame->prepare = prepare_nop;
2448 frame->check = slf_check_nop;
2449 }
2450 else
2451 {
2452 SV *waiter = newRV_inc (SvRV (coro_current)); /* owned by signal av */
2453
2454 av_push (av, waiter);
2455
2456 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2457 frame->prepare = prepare_schedule;
2458 frame->check = slf_check_signal_wait;
2459 }
2460}
2461
2462/*****************************************************************************/
2463/* Coro::AIO */
2464
2465#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2466
2467/* helper storage struct */
2468struct io_state
2469{
2470 int errorno;
2471 I32 laststype; /* U16 in 5.10.0 */
2472 int laststatval;
2473 Stat_t statcache;
2474};
2475
2476static void
2477coro_aio_callback (pTHX_ CV *cv)
2478{
2479 dXSARGS;
2480 AV *state = (AV *)GENSUB_ARG;
2481 SV *coro = av_pop (state);
2482 SV *data_sv = newSV (sizeof (struct io_state));
2483
2484 av_extend (state, items - 1);
2485
2486 sv_upgrade (data_sv, SVt_PV);
2487 SvCUR_set (data_sv, sizeof (struct io_state));
2488 SvPOK_only (data_sv);
2489
2490 {
2491 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2492
2493 data->errorno = errno;
2494 data->laststype = PL_laststype;
2495 data->laststatval = PL_laststatval;
2496 data->statcache = PL_statcache;
2497 }
2498
2499 /* now build the result vector out of all the parameters and the data_sv */
2500 {
2501 int i;
2502
2503 for (i = 0; i < items; ++i)
2504 av_push (state, SvREFCNT_inc_NN (ST (i)));
2505 }
2506
2507 av_push (state, data_sv);
2508
2509 api_ready (aTHX_ coro);
2510 SvREFCNT_dec (coro);
2511 SvREFCNT_dec ((AV *)state);
2512}
2513
2514static int
2515slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2516{
2517 AV *state = (AV *)frame->data;
2518
2519 /* if we are about to throw, return early */
2520 /* this does not cancel the aio request, but at least */
2521 /* it quickly returns */
2522 if (CORO_THROW)
2523 return 0;
2524
2525 /* one element that is an RV? repeat! */
2526 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2527 return 1;
2528
2529 /* restore status */
2530 {
2531 SV *data_sv = av_pop (state);
2532 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2533
2534 errno = data->errorno;
2535 PL_laststype = data->laststype;
2536 PL_laststatval = data->laststatval;
2537 PL_statcache = data->statcache;
2538
2539 SvREFCNT_dec (data_sv);
2540 }
2541
2542 /* push result values */
2543 {
2544 dSP;
2545 int i;
2546
2547 EXTEND (SP, AvFILLp (state) + 1);
2548 for (i = 0; i <= AvFILLp (state); ++i)
2549 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2550
2551 PUTBACK;
2552 }
857 2553
858 return 0; 2554 return 0;
859} 2555}
860 2556
861static void 2557static void
862api_ready (SV *coro) 2558slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
863{ 2559{
864 dTHX; 2560 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
865
866 if (SvROK (coro))
867 coro = SvRV (coro);
868
869 LOCK;
870 coro_enq (aTHX_ SvREFCNT_inc (coro));
871 UNLOCK;
872}
873
874static void
875api_schedule (void)
876{
877 dTHX;
878
879 SV *prev, *next;
880
881 LOCK;
882
883 prev = SvRV (GvSV (coro_current)); 2561 SV *coro_hv = SvRV (coro_current);
884 next = coro_deq (aTHX_ PRIO_MIN); 2562 struct coro *coro = SvSTATE_hv (coro_hv);
885 2563
886 if (!next) 2564 /* put our coroutine id on the state arg */
887 next = SvREFCNT_inc (SvRV (GvSV (coro_idle))); 2565 av_push (state, SvREFCNT_inc_NN (coro_hv));
888 2566
889 /* free this only after the transfer */ 2567 /* first see whether we have a non-zero priority and set it as AIO prio */
890 coro_mortal = prev; 2568 if (coro->prio)
891 SV_CORO (prev, "Coro::schedule"); 2569 {
2570 dSP;
892 2571
893 SvRV (GvSV (coro_current)) = next; 2572 static SV *prio_cv;
2573 static SV *prio_sv;
894 2574
895 SV_CORO (next, "Coro::schedule"); 2575 if (expect_false (!prio_cv))
2576 {
2577 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2578 prio_sv = newSViv (0);
2579 }
896 2580
897 UNLOCK; 2581 PUSHMARK (SP);
2582 sv_setiv (prio_sv, coro->prio);
2583 XPUSHs (prio_sv);
898 2584
899 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), 2585 PUTBACK;
900 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK); 2586 call_sv (prio_cv, G_VOID | G_DISCARD);
901} 2587 }
902 2588
903static void 2589 /* now call the original request */
904api_cede (void) 2590 {
905{ 2591 dSP;
906 dTHX; 2592 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
2593 int i;
907 2594
908 LOCK; 2595 PUSHMARK (SP);
909 coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
910 UNLOCK;
911 2596
912 api_schedule (); 2597 /* first push all args to the stack */
913} 2598 EXTEND (SP, items + 1);
914 2599
2600 for (i = 0; i < items; ++i)
2601 PUSHs (arg [i]);
2602
2603 /* now push the callback closure */
2604 PUSHs (sv_2mortal (gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2605
2606 /* now call the AIO function - we assume our request is uncancelable */
2607 PUTBACK;
2608 call_sv ((SV *)req, G_VOID | G_DISCARD);
2609 }
2610
2611 /* now that the requets is going, we loop toll we have a result */
2612 frame->data = (void *)state;
2613 frame->prepare = prepare_schedule;
2614 frame->check = slf_check_aio_req;
2615}
2616
2617static void
2618coro_aio_req_xs (pTHX_ CV *cv)
2619{
2620 dXSARGS;
2621
2622 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
2623
2624 XSRETURN_EMPTY;
2625}
2626
2627/*****************************************************************************/
2628
915MODULE = Coro::State PACKAGE = Coro::State 2629MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
916 2630
917PROTOTYPES: ENABLE 2631PROTOTYPES: DISABLE
918 2632
919BOOT: 2633BOOT:
920{ /* {} necessary for stoopid perl-5.6.x */ 2634{
921#ifdef USE_ITHREADS 2635#ifdef USE_ITHREADS
922 MUTEX_INIT (&coro_mutex); 2636# if CORO_PTHREAD
2637 coro_thx = PERL_GET_CONTEXT;
2638# endif
923#endif 2639#endif
924 BOOT_PAGESIZE; 2640 BOOT_PAGESIZE;
925 2641
926 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 2642 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
927 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 2643 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
2644
2645 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
2646 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
2647 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
2648
2649 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
2650 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
2651 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
2652
928 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 2653 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
929 2654
930 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 2655 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
931 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 2656 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
932 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 2657 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
933 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 2658 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
934 2659
935 main_mainstack = PL_mainstack; 2660 main_mainstack = PL_mainstack;
2661 main_top_env = PL_top_env;
936 2662
2663 while (main_top_env->je_prev)
2664 main_top_env = main_top_env->je_prev;
2665
2666 {
2667 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
2668
2669 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
2670 hv_store_ent (PL_custom_op_names, slf,
2671 newSVpv ("coro_slf", 0), 0);
2672
2673 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
2674 hv_store_ent (PL_custom_op_descs, slf,
2675 newSVpv ("coro schedule like function", 0), 0);
2676 }
2677
937 coroapi.ver = CORO_API_VERSION; 2678 coroapi.ver = CORO_API_VERSION;
2679 coroapi.rev = CORO_API_REVISION;
2680
938 coroapi.transfer = api_transfer; 2681 coroapi.transfer = api_transfer;
939}
940 2682
941Coro::State 2683 coroapi.sv_state = SvSTATE_;
942_newprocess(args) 2684 coroapi.execute_slf = api_execute_slf;
943 SV * args 2685 coroapi.prepare_nop = prepare_nop;
944 PROTOTYPE: $ 2686 coroapi.prepare_schedule = prepare_schedule;
2687 coroapi.prepare_cede = prepare_cede;
2688 coroapi.prepare_cede_notself = prepare_cede_notself;
2689
2690 {
2691 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2692
2693 if (!svp) croak ("Time::HiRes is required");
2694 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2695
2696 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2697 }
2698
2699 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
2700}
2701
2702SV *
2703new (char *klass, ...)
2704 ALIAS:
2705 Coro::new = 1
945 CODE: 2706 CODE:
946 Coro__State coro; 2707{
2708 struct coro *coro;
2709 MAGIC *mg;
2710 HV *hv;
2711 CV *cb;
2712 int i;
947 2713
948 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV) 2714 if (items > 1)
949 croak ("Coro::State::_newprocess expects an arrayref");
950 2715 {
2716 cb = coro_sv_2cv (aTHX_ ST (1));
2717
2718 if (!ix)
2719 {
2720 if (CvISXSUB (cb))
2721 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
2722
2723 if (!CvROOT (cb))
2724 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
2725 }
2726 }
2727
951 Newz (0, coro, 1, struct coro); 2728 Newz (0, coro, 1, struct coro);
2729 coro->args = newAV ();
2730 coro->flags = CF_NEW;
952 2731
953 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 2732 if (coro_first) coro_first->prev = coro;
954 /*coro->mainstack = 0; *//*actual work is done inside transfer */ 2733 coro->next = coro_first;
955 /*coro->stack = 0;*/ 2734 coro_first = coro;
956 2735
957 /* same as JMPENV_BOOTSTRAP */ 2736 coro->hv = hv = newHV ();
958 /* we might be able to recycle start_env, but safe is safe */ 2737 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
959 /*Zero(&coro->start_env, 1, JMPENV);*/ 2738 mg->mg_flags |= MGf_DUP;
960 coro->start_env.je_ret = -1; 2739 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
961 coro->start_env.je_mustcatch = TRUE;
962 2740
963 RETVAL = coro; 2741 if (items > 1)
2742 {
2743 av_extend (coro->args, items - 1 + ix - 1);
2744
2745 if (ix)
2746 {
2747 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
2748 cb = cv_coro_run;
2749 }
2750
2751 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
2752
2753 for (i = 2; i < items; i++)
2754 av_push (coro->args, newSVsv (ST (i)));
2755 }
2756}
964 OUTPUT: 2757 OUTPUT:
965 RETVAL 2758 RETVAL
966 2759
967void 2760void
968transfer(prev, next, flags) 2761transfer (...)
969 SV *prev
970 SV *next
971 int flags
972 PROTOTYPE: @ 2762 PROTOTYPE: $$
973 CODE: 2763 CODE:
974 PUTBACK; 2764 CORO_EXECUTE_SLF_XS (slf_init_transfer);
975 SV_CORO (next, "Coro::transfer"); 2765
976 SV_CORO (prev, "Coro::transfer"); 2766bool
977 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags); 2767_destroy (SV *coro_sv)
978 SPAGAIN; 2768 CODE:
2769 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
2770 OUTPUT:
2771 RETVAL
979 2772
980void 2773void
981DESTROY(coro)
982 Coro::State coro
983 CODE:
984
985 if (coro->mainstack && coro->mainstack != main_mainstack)
986 {
987 struct coro temp;
988
989 PUTBACK;
990 SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);
991 LOAD (aTHX_ coro);
992 SPAGAIN;
993
994 destroy_stacks (aTHX);
995
996 LOAD ((&temp)); /* this will get rid of defsv etc.. */
997 SPAGAIN;
998
999 coro->mainstack = 0;
1000 }
1001
1002 deallocate_stack (coro);
1003 SvREFCNT_dec (coro->args);
1004 Safefree (coro);
1005
1006void
1007_exit(code) 2774_exit (int code)
1008 int code
1009 PROTOTYPE: $ 2775 PROTOTYPE: $
1010 CODE: 2776 CODE:
1011 _exit (code); 2777 _exit (code);
1012 2778
1013MODULE = Coro::State PACKAGE = Coro::Cont 2779int
2780cctx_stacksize (int new_stacksize = 0)
2781 PROTOTYPE: ;$
2782 CODE:
2783 RETVAL = cctx_stacksize;
2784 if (new_stacksize)
2785 {
2786 cctx_stacksize = new_stacksize;
2787 ++cctx_gen;
2788 }
2789 OUTPUT:
2790 RETVAL
1014 2791
1015# this is slightly dirty (should expose a c-level api) 2792int
2793cctx_max_idle (int max_idle = 0)
2794 PROTOTYPE: ;$
2795 CODE:
2796 RETVAL = cctx_max_idle;
2797 if (max_idle > 1)
2798 cctx_max_idle = max_idle;
2799 OUTPUT:
2800 RETVAL
2801
2802int
2803cctx_count ()
2804 PROTOTYPE:
2805 CODE:
2806 RETVAL = cctx_count;
2807 OUTPUT:
2808 RETVAL
2809
2810int
2811cctx_idle ()
2812 PROTOTYPE:
2813 CODE:
2814 RETVAL = cctx_idle;
2815 OUTPUT:
2816 RETVAL
1016 2817
1017void 2818void
1018yield(...) 2819list ()
1019 PROTOTYPE: @ 2820 PROTOTYPE:
2821 PPCODE:
2822{
2823 struct coro *coro;
2824 for (coro = coro_first; coro; coro = coro->next)
2825 if (coro->hv)
2826 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
2827}
2828
2829void
2830call (Coro::State coro, SV *coderef)
2831 ALIAS:
2832 eval = 1
2833 CODE:
2834{
2835 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
2836 {
2837 struct coro temp;
2838
2839 if (!(coro->flags & CF_RUNNING))
2840 {
2841 PUTBACK;
2842 save_perl (aTHX_ &temp);
2843 load_perl (aTHX_ coro);
2844 }
2845
2846 {
2847 dSP;
2848 ENTER;
2849 SAVETMPS;
2850 PUTBACK;
2851 PUSHSTACK;
2852 PUSHMARK (SP);
2853
2854 if (ix)
2855 eval_sv (coderef, 0);
2856 else
2857 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2858
2859 POPSTACK;
2860 SPAGAIN;
2861 FREETMPS;
2862 LEAVE;
2863 PUTBACK;
2864 }
2865
2866 if (!(coro->flags & CF_RUNNING))
2867 {
2868 save_perl (aTHX_ coro);
2869 load_perl (aTHX_ &temp);
2870 SPAGAIN;
2871 }
2872 }
2873}
2874
2875SV *
2876is_ready (Coro::State coro)
2877 PROTOTYPE: $
2878 ALIAS:
2879 is_ready = CF_READY
2880 is_running = CF_RUNNING
2881 is_new = CF_NEW
2882 is_destroyed = CF_DESTROYED
2883 CODE:
2884 RETVAL = boolSV (coro->flags & ix);
2885 OUTPUT:
2886 RETVAL
2887
2888void
2889throw (Coro::State self, SV *throw = &PL_sv_undef)
2890 PROTOTYPE: $;$
1020 CODE: 2891 CODE:
1021 SV *yieldstack; 2892{
1022 SV *sv; 2893 struct coro *current = SvSTATE_current;
1023 AV *defav = GvAV (PL_defgv); 2894 SV **throwp = self == current ? &CORO_THROW : &self->except;
1024 struct coro *prev, *next; 2895 SvREFCNT_dec (*throwp);
2896 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
2897}
1025 2898
1026 yieldstack = *hv_fetch ( 2899void
1027 (HV *)SvRV (GvSV (coro_current)), 2900api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
1028 "yieldstack", sizeof ("yieldstack") - 1, 2901 PROTOTYPE: $;$
2902 C_ARGS: aTHX_ coro, flags
2903
2904SV *
2905has_cctx (Coro::State coro)
2906 PROTOTYPE: $
2907 CODE:
2908 RETVAL = boolSV (!!coro->cctx);
2909 OUTPUT:
2910 RETVAL
2911
2912int
2913is_traced (Coro::State coro)
2914 PROTOTYPE: $
2915 CODE:
2916 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
2917 OUTPUT:
2918 RETVAL
2919
2920UV
2921rss (Coro::State coro)
2922 PROTOTYPE: $
2923 ALIAS:
2924 usecount = 1
2925 CODE:
2926 switch (ix)
2927 {
2928 case 0: RETVAL = coro_rss (aTHX_ coro); break;
2929 case 1: RETVAL = coro->usecount; break;
1029 0 2930 }
2931 OUTPUT:
2932 RETVAL
2933
2934void
2935force_cctx ()
2936 PROTOTYPE:
2937 CODE:
2938 SvSTATE_current->cctx->idle_sp = 0;
2939
2940void
2941swap_defsv (Coro::State self)
2942 PROTOTYPE: $
2943 ALIAS:
2944 swap_defav = 1
2945 CODE:
2946 if (!self->slot)
2947 croak ("cannot swap state with coroutine that has no saved state,");
2948 else
1030 ); 2949 {
2950 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2951 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
1031 2952
1032 /* set up @_ -- ugly */ 2953 SV *tmp = *src; *src = *dst; *dst = tmp;
1033 av_clear (defav); 2954 }
1034 av_fill (defav, items - 1);
1035 while (items--)
1036 av_store (defav, items, SvREFCNT_inc (ST(items)));
1037 2955
1038 sv = av_pop ((AV *)SvRV (yieldstack));
1039 prev = INT2PTR (struct coro *, SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0))));
1040 next = INT2PTR (struct coro *, SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0))));
1041 SvREFCNT_dec (sv);
1042
1043 transfer (aTHX_ prev, next, 0);
1044 2956
1045MODULE = Coro::State PACKAGE = Coro 2957MODULE = Coro::State PACKAGE = Coro
1046 2958
1047# this is slightly dirty (should expose a c-level api)
1048
1049BOOT: 2959BOOT:
1050{ 2960{
1051 int i; 2961 int i;
2962
2963 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
2964 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2965 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
2966 cv_coro_run = get_cv ( "Coro::_terminate", GV_ADD);
2967 cv_coro_terminate = get_cv ( "Coro::terminate" , GV_ADD);
2968 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
2969
2970 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
2971 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
2972 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
2973 cv_coro_state_new = get_cv ("Coro::State::new", 0); SvREADONLY_on (cv_coro_state_new);
2974
1052 HV *stash = gv_stashpv ("Coro", TRUE); 2975 coro_stash = gv_stashpv ("Coro", TRUE);
1053 2976
1054 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX)); 2977 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1055 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 2978 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1056 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 2979 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1057 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW)); 2980 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1058 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 2981 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1059 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN)); 2982 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1060
1061 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1062 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1063 2983
1064 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 2984 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1065 coro_ready[i] = newAV (); 2985 coro_ready[i] = newAV ();
1066 2986
1067 { 2987 {
1068 SV *sv = perl_get_sv("Coro::API", 1); 2988 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1069 2989
1070 coroapi.schedule = api_schedule; 2990 coroapi.schedule = api_schedule;
1071 coroapi.cede = api_cede; 2991 coroapi.cede = api_cede;
2992 coroapi.cede_notself = api_cede_notself;
1072 coroapi.ready = api_ready; 2993 coroapi.ready = api_ready;
2994 coroapi.is_ready = api_is_ready;
1073 coroapi.nready = &coro_nready; 2995 coroapi.nready = coro_nready;
1074 coroapi.current = coro_current; 2996 coroapi.current = coro_current;
1075 2997
1076 GCoroAPI = &coroapi; 2998 /*GCoroAPI = &coroapi;*/
1077 sv_setiv(sv, (IV)&coroapi); 2999 sv_setiv (sv, (IV)&coroapi);
1078 SvREADONLY_on(sv); 3000 SvREADONLY_on (sv);
1079 } 3001 }
1080} 3002}
1081 3003
1082#if !PERL_MICRO
1083
1084void 3004void
1085ready(self) 3005schedule (...)
1086 SV * self 3006 CODE:
3007 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3008
3009void
3010cede (...)
3011 CODE:
3012 CORO_EXECUTE_SLF_XS (slf_init_cede);
3013
3014void
3015cede_notself (...)
3016 CODE:
3017 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
3018
3019void
3020_set_current (SV *current)
1087 PROTOTYPE: $ 3021 PROTOTYPE: $
1088 CODE: 3022 CODE:
1089 api_ready (self); 3023 SvREFCNT_dec (SvRV (coro_current));
3024 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
1090 3025
1091#endif 3026void
3027_set_readyhook (SV *hook)
3028 PROTOTYPE: $
3029 CODE:
3030 SvREFCNT_dec (coro_readyhook);
3031 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
1092 3032
1093int 3033int
3034prio (Coro::State coro, int newprio = 0)
3035 PROTOTYPE: $;$
3036 ALIAS:
3037 nice = 1
3038 CODE:
3039{
3040 RETVAL = coro->prio;
3041
3042 if (items > 1)
3043 {
3044 if (ix)
3045 newprio = coro->prio - newprio;
3046
3047 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
3048 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
3049
3050 coro->prio = newprio;
3051 }
3052}
3053 OUTPUT:
3054 RETVAL
3055
3056SV *
3057ready (SV *self)
3058 PROTOTYPE: $
3059 CODE:
3060 RETVAL = boolSV (api_ready (aTHX_ self));
3061 OUTPUT:
3062 RETVAL
3063
3064int
1094nready(...) 3065nready (...)
1095 PROTOTYPE: 3066 PROTOTYPE:
1096 CODE: 3067 CODE:
1097 RETVAL = coro_nready; 3068 RETVAL = coro_nready;
1098 OUTPUT: 3069 OUTPUT:
1099 RETVAL 3070 RETVAL
1100 3071
1101void 3072void
1102schedule(...) 3073_pool_handler (...)
1103 PROTOTYPE:
1104 CODE: 3074 CODE:
1105 api_schedule (); 3075 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
1106 3076
1107void 3077void
1108cede(...) 3078async_pool (SV *cv, ...)
1109 PROTOTYPE: 3079 PROTOTYPE: &@
3080 PPCODE:
3081{
3082 HV *hv = (HV *)av_pop (av_async_pool);
3083 AV *av = newAV ();
3084 SV *cb = ST (0);
3085 int i;
3086
3087 av_extend (av, items - 2);
3088 for (i = 1; i < items; ++i)
3089 av_push (av, SvREFCNT_inc_NN (ST (i)));
3090
3091 if ((SV *)hv == &PL_sv_undef)
3092 {
3093 PUSHMARK (SP);
3094 EXTEND (SP, 2);
3095 PUSHs (sv_Coro);
3096 PUSHs ((SV *)cv_pool_handler);
3097 PUTBACK;
3098 call_sv ((SV *)cv_coro_state_new, G_SCALAR);
3099 SPAGAIN;
3100
3101 hv = (HV *)SvREFCNT_inc_NN (SvRV (POPs));
3102 }
3103
3104 {
3105 struct coro *coro = SvSTATE_hv (hv);
3106
3107 assert (!coro->invoke_cb);
3108 assert (!coro->invoke_av);
3109 coro->invoke_cb = SvREFCNT_inc (cb);
3110 coro->invoke_av = av;
3111 }
3112
3113 api_ready (aTHX_ (SV *)hv);
3114
3115 if (GIMME_V != G_VOID)
3116 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3117 else
3118 SvREFCNT_dec (hv);
3119}
3120
3121SV *
3122rouse_cb ()
3123 PROTOTYPE:
1110 CODE: 3124 CODE:
1111 api_cede (); 3125 RETVAL = coro_new_rouse_cb (aTHX);
1112
1113# and these are hacks
1114SV *
1115_aio_get_state ()
1116 CODE:
1117{
1118 struct {
1119 int errorno;
1120 int laststype;
1121 int laststatval;
1122 Stat_t statcache;
1123 } data;
1124
1125 data.errorno = errno;
1126 data.laststype = PL_laststype;
1127 data.laststatval = PL_laststatval;
1128 data.statcache = PL_statcache;
1129
1130 RETVAL = newSVpvn ((char *)&data, sizeof data);
1131}
1132 OUTPUT: 3126 OUTPUT:
1133 RETVAL 3127 RETVAL
1134 3128
1135void 3129void
1136_aio_set_state (char *data_) 3130rouse_wait (...)
1137 PROTOTYPE: $ 3131 PROTOTYPE: ;$
3132 PPCODE:
3133 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
3134
3135
3136MODULE = Coro::State PACKAGE = PerlIO::cede
3137
3138BOOT:
3139 PerlIO_define_layer (aTHX_ &PerlIO_cede);
3140
3141
3142MODULE = Coro::State PACKAGE = Coro::Semaphore
3143
3144SV *
3145new (SV *klass, SV *count = 0)
1138 CODE: 3146 CODE:
3147 RETVAL = sv_bless (
3148 coro_waitarray_new (aTHX_ count && SvOK (count) ? SvIV (count) : 1),
3149 GvSTASH (CvGV (cv))
3150 );
3151 OUTPUT:
3152 RETVAL
3153
3154# helper for Coro::Channel
3155SV *
3156_alloc (int count)
3157 CODE:
3158 RETVAL = coro_waitarray_new (aTHX_ count);
3159 OUTPUT:
3160 RETVAL
3161
3162SV *
3163count (SV *self)
3164 CODE:
3165 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
3166 OUTPUT:
3167 RETVAL
3168
3169void
3170up (SV *self, int adjust = 1)
3171 ALIAS:
3172 adjust = 1
3173 CODE:
3174 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
3175
3176void
3177down (...)
3178 CODE:
3179 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
3180
3181void
3182wait (...)
3183 CODE:
3184 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
3185
3186void
3187try (SV *self)
3188 PPCODE:
1139{ 3189{
1140 struct { 3190 AV *av = (AV *)SvRV (self);
3191 SV *count_sv = AvARRAY (av)[0];
3192 IV count = SvIVX (count_sv);
3193
3194 if (count > 0)
3195 {
3196 --count;
3197 SvIVX (count_sv) = count;
3198 XSRETURN_YES;
3199 }
3200 else
3201 XSRETURN_NO;
3202}
3203
3204void
3205waiters (SV *self)
3206 PPCODE:
3207{
3208 AV *av = (AV *)SvRV (self);
3209 int wcount = AvFILLp (av) + 1 - 1;
3210
3211 if (GIMME_V == G_SCALAR)
3212 XPUSHs (sv_2mortal (newSViv (wcount)));
3213 else
3214 {
1141 int errorno; 3215 int i;
1142 int laststype; 3216 EXTEND (SP, wcount);
1143 int laststatval; 3217 for (i = 1; i <= wcount; ++i)
1144 Stat_t statcache; 3218 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
1145 } *data = (void *)data_; 3219 }
1146
1147 errno = data->errorno;
1148 PL_laststype = data->laststype;
1149 PL_laststatval = data->laststatval;
1150 PL_statcache = data->statcache;
1151} 3220}
3221
3222MODULE = Coro::State PACKAGE = Coro::Signal
3223
3224SV *
3225new (SV *klass)
3226 CODE:
3227 RETVAL = sv_bless (
3228 coro_waitarray_new (aTHX_ 0),
3229 GvSTASH (CvGV (cv))
3230 );
3231 OUTPUT:
3232 RETVAL
3233
3234void
3235wait (...)
3236 CODE:
3237 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
3238
3239void
3240broadcast (SV *self)
3241 CODE:
3242{
3243 AV *av = (AV *)SvRV (self);
3244 coro_signal_wake (aTHX_ av, AvFILLp (av));
3245}
3246
3247void
3248send (SV *self)
3249 CODE:
3250{
3251 AV *av = (AV *)SvRV (self);
3252
3253 if (AvFILLp (av))
3254 coro_signal_wake (aTHX_ av, 1);
3255 else
3256 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
3257}
3258
3259IV
3260awaited (SV *self)
3261 CODE:
3262 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
3263 OUTPUT:
3264 RETVAL
3265
3266
3267MODULE = Coro::State PACKAGE = Coro::AnyEvent
3268
3269BOOT:
3270 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
3271
3272void
3273_schedule (...)
3274 CODE:
3275{
3276 static int incede;
3277
3278 api_cede_notself (aTHX);
3279
3280 ++incede;
3281 while (coro_nready >= incede && api_cede (aTHX))
3282 ;
3283
3284 sv_setsv (sv_activity, &PL_sv_undef);
3285 if (coro_nready >= incede)
3286 {
3287 PUSHMARK (SP);
3288 PUTBACK;
3289 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3290 }
3291
3292 --incede;
3293}
3294
3295
3296MODULE = Coro::State PACKAGE = Coro::AIO
3297
3298void
3299_register (char *target, char *proto, SV *req)
3300 CODE:
3301{
3302 CV *req_cv = coro_sv_2cv (aTHX_ req);
3303 /* newXSproto doesn't return the CV on 5.8 */
3304 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3305 sv_setpv ((SV *)slf_cv, proto);
3306 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3307}
3308

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